US20220093922A1 - Halogenated battery comprising a greenhouse gas - Google Patents
Halogenated battery comprising a greenhouse gas Download PDFInfo
- Publication number
- US20220093922A1 US20220093922A1 US17/475,272 US202117475272A US2022093922A1 US 20220093922 A1 US20220093922 A1 US 20220093922A1 US 202117475272 A US202117475272 A US 202117475272A US 2022093922 A1 US2022093922 A1 US 2022093922A1
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- US
- United States
- Prior art keywords
- battery
- cathode
- anode
- electrolyte
- active material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Images
Classifications
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- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
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- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present application relates generally to halogenated batteries comprising an anode, a cathode, and an electrolyte.
- the halogenated batteries can be operated under an atmosphere comprising a greenhouse gas, wherein the battery is fabricated under a greenhouse gas atmosphere, or wherein the greenhouse gas is introduced into the battery before use.
- the present application also relates to halogenated batteries comprising an aliphatic nitrile compound as part of the electrolyte, an organic material having a conjugated cyclic structure as part of the cathode active material, or a metal oxide as part of the anode active material.
- Batteries are in high demand for a wide range of applications, from small batteries for industrial and medical devices, to larger batteries for electric vehicles and grid energy storage systems.
- the most well-known and widely used batteries are lithium-ion batteries, which use an intercalated lithium compound as one electrode material and have lithium ions move back and forth between the cathode and anode in the pond of electrolyte.
- Low cycle life, slow charging rate, poor temperature performance and high materials costs may adversely impact the widespread adoption of such batteries in certain applications. It would therefore be advantageous to provide an improved battery that addresses these and other issues.
- the present application discloses a battery that advantageously exhibits fast charging and long battery life, which may be produced relatively inexpensively by virtue of using a halogenated (e.g., iodized) compound as a cathode active material.
- the battery may be fabricated in a greenhouse gas atmosphere according to an exemplary embodiment.
- the gas may be introduced into the battery to displace all or a portion of the gas that may be present within the battery.
- batteries produced in accordance with the present disclosure exhibit an improvement in cycle life, applicable current, self-discharge rate, specific capacity, operating voltage, and low-temperature performance.
- the present disclosure relates to a battery, comprising: a cathode comprising a halogenated compound as a cathode active material; an anode comprising an anode active material; an electrolyte comprising an electrolytic solvent, wherein the electrolytic solvent is between the cathode and the anode and in contact with the cathode and the anode; and an exterior housing enclosing the cathode, the anode, the electrolyte, and a gaseous atmosphere, wherein the gaseous atmosphere comprises a greenhouse gas.
- one or both of the cathode and the anode further comprises an electrically-conductive material comprising a porous carbon in contact with the cathode active material.
- the porous carbon material is selected from the group consisting of carbon black, carbon nanotubes, carbon nanofibers, carbon dots, activated carbon, graphite, graphene, graphene oxide, reduced graphene oxide, graphene nanoribbons, and combinations thereof.
- the porous carbon material is doped with one or more heteroatoms selected from the group consisting of boron, oxygen, nitrogen, sulfur, phosphorous, fluorine, chlorine, bromine, and combinations thereof.
- the electrolyte comprises an aliphatic nitrile compound.
- the battery further comprises an electrolyte additive, wherein the electrolyte additive comprises a heterocyclic compound comprising at least one nitrogen atom in its ring.
- the cathode further comprises an organic material having a conjugated cyclic structure.
- the halogenated compound comprises an organic moiety.
- the cathode and/or the electrolyte further comprise(s) a plasticizer.
- the cathode and/or the electrolyte further comprise(s) a carboxylic acid.
- the greenhouse gas comprises carbon dioxide (CO 2 ), carbon monoxide (CO), ozone (O 3 ), methane (CH 4 ), tetrafluoromethane (CF 4 ), hexafluoroethane (C 2 F 6 ), sulfur hexafluoride (SF 6 ), carbon tetrachloride (CCl 4 ), nitrous oxide (N 2 O), sulfur dioxide (SO 2 ), carbon disulfide (CS 2 ), and carbonyl sulfide (COS), one or more perfluorocarbons, one or more chlorofluorocarbons, one or more hydrofluorocarbons, or a combination thereof.
- the greenhouse gas comprises carbon dioxide.
- the greenhouse gas is excluded from an electrochemical reaction during one or more of charging and discharging of the battery.
- the battery further comprises a cathode current collector, wherein the cathode current collector is in contact with the cathode, and the cathode is between the electrolyte and the cathode current collector.
- the cathode current collector comprises a metal alloy having at least one material selected from the group consisting of molybdenum, titanium, zirconium, and combinations thereof.
- the battery further comprises an anode current collector, wherein the anode current collector is in contact with the anode, and the anode is between the electrolyte and the anode current collector.
- the anode current collector comprises a metal alloy having at least one material selected from the group consisting of molybdenum, titanium, zirconium, and combinations thereof.
- the halogenated compound is soluble in the electrolytic solvent. In some embodiments, the halogenated compound has a solubility of greater than 1 mmol/L in the electrolytic solvent at room temperature. In some embodiments, the halogenated compound has a solubility of greater than 10 mmol/L in the electrolytic solvent at room temperature.
- the present disclosure relates to a method for producing a battery, comprising: inserting cell components into an exterior housing in the following order: (1) an anode current collector; (2) an anode; (3) an electrolyte; (4) a cathode; and (5) a cathode current collector, or vice versa, wherein: the electrolyte is between the cathode and the anode; the cathode is between the cathode current collector and the electrolyte; and the anode is between the anode current collector and the electrolyte; compressing the cell components so that the electrolyte is homogeneously in contact with the anode and the cathode; enclosing the cell in the exterior housing under a greenhouse gas-rich atmosphere; charging and/or discharging the battery at least one time; opening the battery to displace forming gas generated during the charge and/or discharge cycle; and closing the cell under the greenhouse gas-rich atmosphere or an inert
- the cathode comprises a halogenated compound.
- the electrolyte comprises an aliphatic nitrile compound.
- the charging and/or discharging is conducted at a current density of 0.1 mA/cm 2 or less.
- the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less.
- the present disclosure relates to a method for producing a battery, comprising: inserting cell components into an exterior housing in the following order: (1) an anode current collector; (2) an anode; (3) an electrolyte; (4) a cathode; and (5) a cathode current collector, or vice versa, wherein: the electrolyte is between the cathode and the anode; the cathode is between the cathode current collector and the electrolyte; and the anode is between the anode current collector and the electrolyte; compressing the cell components so that the electrolyte is homogeneously in contact with the anode and the cathode; enclosing the cell in the exterior housing under an atmosphere that is not greenhouse gas-rich; purging the cell with a greenhouse gas to create a greenhouse gas-rich atmosphere within the cell; charging and/or discharging the battery at least one time; opening the battery to displace forming gas generated during
- the cathode comprises a halogenated compound as a cathode active material.
- the electrolyte comprises an aliphatic nitrile compound.
- the charging and/or discharging is conducted at a current density of 0.1 mA/cm 2 or less.
- the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less.
- the present disclosure relates to a battery, comprising: a cathode comprising a halogenated compound as a cathode active material; an electrolyte comprising at least three carbonate compounds; and an exterior housing enclosing the cathode, the electrolyte, and a gaseous atmosphere, wherein the gaseous atmosphere comprises a greenhouse gas.
- the greenhouse gas comprises carbon dioxide.
- the present disclosure relates to a battery comprising a cathode comprising a halogenated compound, and an electrolyte comprising an electrolyte additive, wherein the electrolyte additive comprises a heterocyclic compound including at least one nitrogen atom in its ring.
- FIG. 1 is a schematic view of a battery according to an exemplary embodiment.
- FIG. 2 is a schematic view of a battery according to another exemplary embodiment.
- FIG. 3 is a schematic view of a battery according to another exemplary embodiment.
- FIG. 4 is a schematic view of a battery according to another exemplary embodiment.
- FIG. 5 is a schematic view of an apparatus for dissolving a greenhouse gas in a liquid electrolyte.
- FIG. 6 is a flow chart of a method of fabricating a battery according to an exemplary embodiment.
- FIG. 7 is a flow chart of a method of fabricating a battery according to another exemplary embodiment.
- FIG. 8 is a flow chart of a method of fabricating a battery according to another exemplary embodiment.
- FIG. 9 is a flow chart of a method of fabricating a battery according to another exemplary embodiment.
- FIG. 10 is a plot showing the high-rate capability of a battery comprising a halogenated compound as a cathode active material, a metal oxide as an anode active material, an aliphatic nitrile compound as an electrolyte, a plasticizer, a carboxylic acid and carbon dioxide.
- FIG. 11 is a plot showing low temperature performance of a battery comprising a halogenated compound as a cathode active material, a metal oxide as an anode active material, a nitrile and a heterocyclic compound with a nitrogen atom in its ring as an electrolyte, a plasticizer, a carboxylic acid, and carbon dioxide.
- FIG. 12 is a plot showing specific capacity at low operating temperature for a battery comprising a halogenated compound as cathode active material, lithium metal as anode, an aliphatic nitrile compound (LiTFSI-MAN) as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring (5% MIB) as an electrolyte additive, succinonitrile as a plasticizer, a carboxylic acid, and carbon dioxide internal atmosphere, versus that observed for a convention battery using a LiPF6-based electrolyte and NMC111 cathode.
- LiTFSI-MAN aliphatic nitrile compound
- MIB aliphatic nitrile compound with a nitrogen atom in its ring
- succinonitrile as a plasticizer
- carboxylic acid a carboxylic acid
- carbon dioxide internal atmosphere versus that observed for a convention battery using a LiPF6-based electrolyte and NMC111 cathode.
- FIG. 13 is a plot showing the specific capacity of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the electrolyte additive.
- FIG. 14 is a plot showing the average operating voltage of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the electrolyte additive.
- FIG. 15 is a plot showing the electrochemical utilization of the active materials of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, at different sweeping rates.
- FIG. 16 is a plot showing specific capacity of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid and carbon dioxide, as a function of the carbon dioxide pressure in the experimental setup used to dissolve the carbon dioxide in the electrolyte.
- FIG. 17 is a plot showing the specific capacity of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the carbon dioxide pressure in the cell atmosphere.
- FIG. 18 is a plot showing self-discharge rate of a battery comprising a halogenated compound as a cathode active material, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the carbon dioxide pressure in the cell atmosphere.
- FIG. 19 is a plot showing the specific capacity and the coulombic efficiency of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the plasticizer concentration.
- FIG. 20 is a plot the self-discharge rate of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the plasticizer concentration.
- FIG. 21 is a plot showing the superior cycle life (at 0° C. operating temperature) of a battery comprising a halogenated compound as a cathode active material, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide.
- the present application relates to batteries and methods of producing such batteries that address various issues affecting with existing batteries.
- the batteries described according to the various exemplary (and non-limiting) examples herein provide several advantages. For example, the batteries will have higher energy density, higher power density, longer cycle life, and/or the batteries will exhibit enhanced low temperature performance, when compared to existing batteries.
- anode refers to the negative electrode of a battery cell that transfers electrons to an external circuit through oxidation during discharging, and receives them from an external circuit and is reduced during charging.
- the term “cathode” refers to the positive electrode of a battery cell that receives electrons from an external circuit and is reduced during discharging, and transfers them to an external circuit through oxidation during charging.
- the cathode material includes a halogenated compound and/or an electroactive organic material as defined above.
- the term “current collector” is used to refer to the component adjacent to the positive and the negative electrode for conveying current from a fixed to a moving portion of the circuit of the battery or vice versa
- electrolyte refers to a material that provides for ion transport of a battery cell.
- An electrolyte acts as a conduit for ion transport through its interaction with the anode and the cathode.
- an electrolyte Upon battery charging, an electrolyte facilitates the movement of ions from the cathode to the anode, whereas upon discharge, the electrolyte facilitates the movement of ions from the anode to the cathode.
- the electrolyte promotes ion cycling between the anode and the cathode.
- full lifecycle of the battery is intended to mean that the life of the battery is considered to have exceeded its normal useful life, which is assumed here to be the point at which the battery shows 80% of its original capacity for the first time.
- greenhouse gas refers to a gas that absorbs and emits radiant energy within the thermal infrared range.
- a greenhouse gas causes the greenhouse effect, the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere.
- Some non-exclusive examples include carbon dioxide (CO 2 ), methane (CH 4 ), nitrous oxide (N 2 O), ozone (O 3 ), tetrafluoromethane (CF 4 ), hexafluoroethane (C 2 F 6 ), sulfur hexafluoride (SF 6 ), carbon tetrachloride (CCl 4 ), sulfur hexafluoride (SF 6 ), nitrogen trifluoride (NF 3 ), hydrofluorocarbons, chlorofluorocarbons, perfluorocarbons although there are many additional possibilities, some of which are discussed below.
- halogenated compound refers to a compound comprising at least one halogen and at least one metal or at least one oxygen atom.
- Some non-exclusive examples include ClO 2 , LiCl, and LiClO 3 although there are many additional possibilities, some of which are discussed below.
- heterocyclic compound refers to a cyclic compound that has atoms of at least two different elements as members of its ring.
- aliphatic nitrile compound refers to an open-chain compound comprising at least one nitrile functional group.
- the aliphatic nitrile compound can be straight or branched, and contain no rings of any type.
- plasticizer refers to a material that is added to an organic material to make it softer and more flexible, to increase its plasticity.
- standard atmospheric pressure is intended to mean a unit of pressure defined as 101,325 Pa, which is equivalent to 760 mm Hg, 29.9212 inches Hg, 14.696 psi, or 1.013 bar.
- Batteries according to the present disclosure comprise a cathode active material.
- the cathode active material refers to the portion or component of a cathode that participates in electrochemical reactions (e.g., reduction, oxidation) by transporting ions through an electrolyte and/or electrons through an external circuit.
- the cathode active material may constitute the entirety of the cathode, but is typically only a component of, or a coating on, the cathode.
- the cathode active material comprises a sulfide (e.g., metal titanium disulfide, metal polysulfide, M 2 S, M 2 S 2 , M 2 S 4 , M 2 S 6 , M 2 S 2 , MV 0.5 Ti 0.5 S 2 , where M is a metal), a sulfur containing material (e.g., sulfate, organosulfur), an oxide (e.g., a material of the form M x Ti 5 O 12 , TiO 2 , TiNb 2 O 7 , Nb 2 O 5 , M x VO 4 , H 2 Ti 6 O 13 , M x MnBO 3 , M x V 2 O 5 , M x MoO 4 , M x W 2 O 7 , M′ 1 ⁇ x M′′O 2 , M′ 1 ⁇ w (M′′ x M′′′ y )O 2 , M 1 ⁇ w (Mn x Ni y Co z )O 2
- the cathode comprises one or more of an organic material having a conjugated cyclic structure and an electroactive organic material (e.g., truxenone, truxenone derivatives, phenoxazine, phenoxazine derivatives, phenothiazine, phenothiazine, derivatives (e.g., 10-acetylphenothiazine, 10-[2(2-methoxyethoxy)ethyl]-10H-phenothiazine), quinone, quinone derivatives (e.g., 2,2′-(2-vinylanthracene-9,10-diylidene)dimalononitrile, 2-vinylanthraquinone, anthraquinone-2,6-disulfonate, anthraquinone-1,8-disulfonate, anthraquinone-1-sulfonate, anthraquinone-1,5-d
- the cathode active material comprises a halogenated compound.
- the halogenated compound comprises one or more halogen atoms (e.g., F, Cl, Br, or I).
- the halogenated compound comprises one or more metal atoms (e.g., alkaline earth metal, transition metal, rare earth metal, post-transition metal, alkali metal, amphoteric metal or any combination thereof).
- the halogenated compound has a chemical formula of M a C b H c O d A x , wherein M is a metal, C is a carbon atom, H is a hydrogen atom, O is an oxygen atom, A is a halogen atom, a, b, c, and d are independently non-negative real numbers, and x is a positive nonzero real number.
- the halogenated compound has a chemical formula of M x C a H b O c A y , wherein M is a metal, C is a carbon atom, H is a hydrogen atom, O is an oxygen atom, A is a halogen atom, a, b, and c are independently non-negative real numbers, and x and y are independently positive nonzero real numbers.
- the halogenated compound has a chemical formula of M a C b H c O x A y , wherein M is a metal, C is a carbon atom, H is a hydrogen atom, O is an oxygen atom, A is a halogen atom, a, b, and c are independently non-negative real numbers, and x and y are independently positive nonzero real numbers.
- the halogenated compound has a chemical formula of M x M′ a P b C c H d O e A y , wherein M is a metal, M′ is another metal, P is a phosphorous atom, C is a carbon atom, H is a hydrogen atom, O is an oxygen atom, A is a halogen atom, a, b, c, d, and e are independently non-negative real numbers, and x and y are independently positive nonzero real numbers.
- the halogenated compound has a chemical formula of M x A y , wherein M is a metal, A is a halogen atom, and x and y are independently positive nonzero real numbers.
- the metal comprises atoms of one or more of lithium, sodium, potassium, beryllium, magnesium, calcium, vanadium, iron, nickel, copper, zinc, and aluminum, and ions thereof.
- the halogenated compound comprises, by way of non-limiting example, LiCl, LiClO, LiClO 3 , LiClO 4 , Li 3 ClO, Li 17 Cl 5 O 6 , LiClO 2 , Li 5 Cl 3 O, LiCl 2 O 4 , LiClO 7 , LiBr, Li 3 BrO, Li 7 Br 3 O 2 , Li 2 BrO, Li 5 Br 3 O 2 , LiBrO 3 , LiBrO, LiI, LiI 03 , Li 5 IO 6 , LiIO 4 , Li 2 IO 6 , LiIO 5 , LiF, LiC 4 OF 9 , LiH 8 C 4 O 5 F 9 , Li 2 H 10 C 8 O 7 F 18 , LiH 20 C 8 ClO 4 , LiH 20 C 8 BrO 4 , LiH 2 ClO 5 , Li 4 H 3 ClO 3 , LiH 6 ClO 7 , LiH 2 ClO, LiH 6 BrO 7 , LiH 2 BrO 7 ,
- the halogenated compound has one or more of organic moieties, where an organic moiety comprises one or more of carbon and hydrogen and is a fragment or substituent of a larger material.
- the organic moiety is derived from an appropriate organic material or organic compound.
- the organic moieties comprise, by way of non-limiting examples, alkyl groups, alkenyl groups, alkynyl groups, acyl groups, alkylamino groups, aryl groups, aromatic groups or any combinations thereof.
- the organic moiety comprises a heteroatom, such as boron, oxygen, nitrogen, sulfur, phosphorous, fluorine, chlorine, bromine, nitrogen, oxygen, or any combinations thereof.
- the halogenated compound comprises an organic moiety that includes one or more aromatic groups.
- aromatic group is intended to mean a functional group that contain one or more rings with pi electrons delocalized all the way around them.
- a battery according to the present disclosure comprises a cathode current collector.
- the cathode current collector comprises one or more metals (e.g., alkaline earth metal, transition metal, rare earth metal, post-transition metal, alkali metal, or any combination thereof).
- the cathode current collector comprises at least one of aluminum, a form of aluminum, aluminum alloy, nickel, a form of nickel, nickel alloy, duplex steel, stainless steel or any combination thereof.
- the cathode current collector comprises a metal alloy having at least one material selected from the group consisting of molybdenum, titanium, zirconium, and combinations thereof.
- the cathode current collector is in contact with (e.g., coated with) a halogenated compound and/or an electrically-conductive material.
- the electrically conductive material as part of the cathode is a porous carbon material comprising, consisting essentially of, or is selected from the group consisting of carbon black, carbon nanotubes, carbon nanofibers, carbon dots, activated carbon, amorphous carbon, microporous carbon, mesoporous carbon, macroporous carbon, graphite, graphene, graphene oxide, reduced graphene oxide, graphene nanoribbons, and combinations thereof.
- the porous carbon material is doped with one or more heteroatoms selected from the group consisting of boron, oxygen, nitrogen, sulfur, phosphorous, fluorine, chlorine, bromine, and combinations thereof.
- the electrically-conductive material is in the form of particles, powders, paper, foam, fibers, sheets, discs, rods, foils, or any combination thereof.
- the electrically conductive material comprises a porous carbon material.
- the porous carbon material comprises particles with an average particle size (diameter) of 50 nm to 50 ⁇ m, though the particle size is not particularly limited.
- the average particle size is at least 50 nm, at least 55 nm, at least 60 nm, at least 65 nm, at least 70 nm, at least 75 nm, at least 80 nm, at least 85 nm, at least 90 nm, at least 95 nm, at least 100 nm, at least 110 nm, at least 120 nm, at least 130 nm, at least 140 nm, at least 150 nm, at least 200 nm, at least 250 nm, at least 300 nm, at least 350 nm, at least 400 nm, at least 450 nm, at least 500 nm, at least 550 nm, at least 600 nm, at least 650 n
- the porous carbon material comprises particles with an average particle size (diameter) no greater than 50 ⁇ m, no greater than 40 ⁇ m, no greater than 30 ⁇ m, no greater than 20 ⁇ m, no greater than 10 ⁇ m, no greater than 5 ⁇ m, no greater than 4 ⁇ m, no greater than 3 ⁇ m, no greater than 2 ⁇ m, no greater than 1 ⁇ m, no greater than 950 nm, no greater than 900 nm, no greater than 850 nm, no greater than 800 nm, no greater than 750 nm, no greater than 700 nm, no greater than 650 nm, no greater than 600 nm, no greater than 550 nm, no greater than 500 nm, no greater than 450 nm, no greater than 400 nm, no greater than 350 nm, no greater than 300 nm, no greater than 250 nm, no greater than 200 nm, no greater than 150 nm, no greater than 100 nm, no greater than 300
- the pore size of the porous carbon material is not particularly limited.
- the porous carbon material may have a pore size of 0.1 nm to 1 ⁇ m.
- the pore size is at least 0.1 nm, at least 0.2 nm, at least 0.3 nm, at least 0.4 nm, at least 0.5 nm, at least 0.6 nm, at least 0.7 nm, at least 0.8 nm, at least 0.9 nm, at least 1 nm, at least 2 nm, at least 3 nm, at least 4 nm, at least 5 nm, at least 6 nm, at least 7 nm, at least 8 nm, at least 9 nm, at least 10 nm, at least 20 nm, at least 30 nm, at least 40 nm, at least 50 nm, at least 60 nm, at least 70 nm, at least 80 nm, at least 90 nm, at least 100
- the pore size is no greater than 10 ⁇ m, no greater than 9 ⁇ m, no greater than 8 ⁇ m, no greater than 7 ⁇ m, no greater than 6 ⁇ m, no greater than 5 ⁇ m, no greater than 4 ⁇ m, no greater than 3 ⁇ m, no greater than 2 ⁇ m, no greater than 1 ⁇ m, no greater than 950 nm, no greater than 900 nm, no greater than 850 nm, no greater than 800 nm, no greater than 750 nm, no greater than 700 nm, no greater than 650 nm, no greater than 600 nm, no greater than 550 nm, no greater than 500 nm, no greater than 450 nm, no greater than 400 nm, no greater than 300 nm, no greater than 250 nm, no greater than 200 nm, no greater than 150 nm, no greater than 100 nm, no greater than 90 nm, no greater than 80 nm, no greater than 70 n
- the current collector is perforated, wherein the pore size is not particularly limited.
- the pore size is at least 500 nm, at least 550 nm, at least 600 nm, at least 650 nm, at least 700 nm, at least 750 nm, at least 800 nm, at least 850 nm, at least 900 nm, at least 950 nm, at least 1 ⁇ m, at least 2 ⁇ m, at least 3 ⁇ m, at least 4 ⁇ m, at least 5 ⁇ m, at least 10 ⁇ m, at least 20 ⁇ m, at least 30 ⁇ m, at least 40 ⁇ m, at least 50 ⁇ m, at least 60 ⁇ m, at least 70 ⁇ m, at least 80 ⁇ m, at least 90 ⁇ m, at least 100 ⁇ m, at least 150 ⁇ m, at least 200 ⁇ m, at least 250 ⁇ m, at least 300 ⁇ m, at least 350 ⁇ m, at least 400 ⁇
- the distance between pores is not particularly limited. In some embodiments the distance between pores is at least 10 ⁇ m, at least 15 ⁇ m, at least 20 ⁇ m, at least 25 ⁇ m, at least 30 ⁇ m, at least 35 ⁇ m, at least 40 ⁇ m, at least 45 ⁇ m, at least 50 ⁇ m, at least 55 ⁇ m, at least 60 ⁇ m, at least 65 ⁇ m, at least 70 ⁇ m, at least 75 ⁇ m, at least 80 ⁇ m, at least 85 ⁇ m, at least 90 ⁇ m, at least 95 ⁇ m, at least 100 ⁇ m, at least 150 ⁇ m, at least 200 ⁇ m, at least 250 ⁇ m, at least 300 ⁇ m, at least 350 ⁇ m, at least 400 ⁇ m, at least 450 ⁇ m, at least 500 ⁇ m, at least 550 ⁇ m, at least 600 ⁇ m, at least 650 ⁇ m, at least 700 ⁇ m, at least 750 ⁇ m, at least 800 ⁇ m, at
- a battery according to the present disclosure comprises an electrolyte.
- the electrolyte comprises an electrolytic solvent, wherein the electrolytic solvent is between the cathode and the anode and in contact with the cathode and the anode.
- the electrolyte comprises a solid electrolyte (e.g., polymers, glass, phosphates, fluorophosphates, carbonates, amines, borates, fluoroborates, halides, halates, oxohalides, oxides (e.g., MO 2 , M 2 O 3 , M 2 B 2 O 5 , M 2 O, MOH, M 2 O 2 , M 2 CO 3 , P 2 O 5 , MPO 4 , M 2 M′ 3 O 7 , wherein M is a metal or metalloid), perovskites, antiperovskites (e.g., M 3 OBr, M 0 OCl, M 2 OHBr, M 2 OHCl, wherein M is a metal or metalloid), LISICON-type electrolytes (e.g., M 1+x M′ x M′′ 2 ⁇ x (PO 4 ) 3 , M 2+2x M′ 1 ⁇ x M′′O 4 , M (3+
- the electrolyte comprises an aqueous electrolyte. In some embodiments, the electrolyte comprises at least one aliphatic nitrile compound. In some embodiments, the aliphatic nitrile compound comprises, by way of non-limiting example, 3-methoxypropionitrile (MPN), methoxyacetonitrile (MAN), acetonitrile (AN), valeronitrile (VN), succinonitrile, glutaronitrile, adiponitrile, acrylonitrile, propionitrile, tolunitrile, methoxybenzonitrile, malononitrile, tetracyanoethylene, 3,3′-oxydipropionitrile, 3-ethoxypropionitrile, 1,3,6-hexanetricarbonitrile, 1,2,2,3-propanetetracarbonitrile, malononitrile, fumaronitrile, or 3-butoxypropionitrile or any combination thereof.
- MPN 3-methoxypropionitrile
- MAN meth
- the electrolyte comprises a heterocyclic compound with at least one nitrogen atom in its ring.
- the electrolyte comprises pyridine, imidazole, 1,2,3,6-tetrahydropyridine, piperidine, methylpyridine, aminopyridine, ethynylpyridine, vinylpyridine, dimethylpyridine, ethylpyridine, lutidine, 4-tert-butylpyridine (TBP), 2,2′-bipyridine (BPY), 1-methylimidazole (MI), 1-methylbenzimidazole (MIB), 1-(trimethylsilyl) imidazole), methylimidazoline, vinylimidazole, dimethylimidazole, mercaptoimidazole, histamine, nitroimidazole, ethylpiperazine, methimazole, thiamazole, 2-mercapto-1-methylimidazole, dicyanoimidazole, or any combination thereof.
- the electrolyte comprises at least one, preferably at least two, or more preferably at least three carbonate compounds.
- the carbonate compounds comprise ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), propylene carbonate (PC), dipropyl carbonate (DPC), fluoroethylene carbonate (FEC), vinylene carbonate, 4-vinyl-1,3-dioxolan-2-one, 4-chloro-1,3-dioxolan-2-one, diethyl 2,5-dioxahexanedioate, bis(2,2,2-trifluoroethyl) carbonate, 4-fluoro-1,3-dioxolan-2-one, dimethyl 2,5-dioxahexanedioate, dibutyl carbonate, among others or any combination thereof.
- the electrolyte comprises at least one ether compound.
- the ether compounds comprise, by way of non-limiting example, dime thoxyethane, dimethoxymethane, dimethyl ether, diethyl ether, ethylene glycol, ethylene glycol derivatives (diglyme, triglyme, tetraglyme), tetrahydrofuran, dioxolane, dioxane, or any combinations thereof.
- the electrolyte comprises at least one amide compound.
- the amide compounds comprise, by way of non-limiting example, dimethylformamide, dimethylacetamide, dipropylacetamide, among others, or any combinations thereof.
- the electrolyte comprises at least one ester compound.
- the ester compounds comprise, by way of non-limiting example, triethyl borate, trimethyl borate, tris(2,2,2-trifluoroethyl) borate, 2,4,6-trimethoxyboroxin, tributyl borate, trihexyl borate, tripropyl borate, or any combinations thereof.
- the electrolyte comprises at least one ionic liquid.
- the ionic liquids comprise, by way of non-limiting example, an imidazolium derivative (such as, for example, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-2,3-dimethylimidazolium bis(trifluoro-methanesulfonyl)imide, 1-ethyl-3-methylimidazolium bis(trifluoro-methanesulfonyl)imide, 2,3-dimethyl-1-propylimidazolium bis(trifluoro-methanesulfonyl)imide, 1-decyl-3-methyl-imidazolium tetrafluoroborate, 1-decyl-3-methylimidazolium bis(trifluoro-methanesulfonyl)imide, 1,3-dimethylimidazolium bis(
- the electrolytic solvent is in contact with the cathode active material. In some embodiments, the electrolytic solvent is in contact with the cathode active material, and is located in the cathode (e.g., in between particles constituting the cathode active material).
- the halogenated compound is soluble in the electrolytic solvent. In some embodiments, the halogenated compound has a solubility of greater than 1 mmol/L in the electrolytic solvent at room temperature. Preferably, the halogenated compound has a solubility of greater than 10 mmol/L in the electrolytic solvent at room temperature. More preferably, the halogenated compound has a solubility of greater than 100 mmol/L in the electrolytic solvent at room temperature.
- a battery according to the present disclosure includes an electrolyte additive.
- the electrolyte additive comprises phosphazenes, phosphates, sulfonyls, carboxylic acids, or any combinations thereof.
- the electrolyte additive comprises a heterocyclic compound with a nitrogen atom in its ring.
- the electrolyte comprises, by way of non-limiting example, pyridine, imidazole, 1,2,3,6-tetrahydropyridine, piperidine, methylpyridine, aminopyridine, ethynylpyridine, vinylpyridine, dimethylpyridine, ethylpyridine, lutidine, 4-tert-butylpyridine (TBP), 2,2′-bipyridine (BPY), 1-methylimidazole (MI), 1-methylbenzimidazole (MIB), 1-(trimethylsilyl) imidazole), methylimidazoline, vinylimidazole, dimethylimidazole, mercaptoimidazole, histamine, nitroimidazole, ethylpiperazine, methimazole, thiamazole, 2-mercapto-1-methylimidazole, dicyanoimidazole, or any combination thereof.
- TBP 4-tert-butylpyridine
- BPY 2,2′-bipyridine
- MI
- a battery according to the present disclosure comprises an anode comprising an anode active material.
- the anode active material refers to the portion or component of an anode that participates in electrochemical reactions (e.g., reduction, oxidation) by transporting ions through an electrolyte and/or electrons through an external circuit.
- the anode active material may constitute the entirety of the anode, but is typically only a component of, or a coating on, the anode.
- the selection of anode active material is not particularly restricted provided that the selected material can store and release ions.
- the anode active material can be an alkali metal (such as lithium, sodium, and/or potassium), an alkaline earth metal (such as, magnesium and/or calcium), an amphoteric metal (such as aluminum and/or zinc), a metalloid (such as boron, germanium, arsenic, antimony, tin, tellurium, polonium, and/or silicon), a metal complex, an inorganic carbon (such as graphite, graphene, graphene oxide, reduced graphene oxide, activated carbon, carbon nanotubes, and/or carbon dots), sulfur, a sulfide (such a metal titanium disulfide MV 0.5 Ti 0.5 S 2 , where M is a metal, metal sulfide (M 2 S), metal polysulfide (e.g., M 2 S 2 , M 2 S 4 , M 2 S 6 , M 2 S 8 )), a sulfur-containing compound or material (such as a sulfate or organosulfur
- the anode active material comprises a silicon atom. In some embodiments, the anode comprises a non-metal oxide as an anode active material. In some embodiments, the anode comprises a metal oxide. In some embodiments, the metal oxide comprises one or more of titanium, niobium, and vanadium.
- the anode comprises, by way of non-limiting example, a metal oxide such as Li 4 Ti 5 O 12 , TiO 2 , TiNb 2 O 7 , Nb 2 O 5 , Li 3 VO 4 , H 2 Ti 6 O 13 , LiMnBO 3 , LiV 0.5 Ti 0.5 S 2 , Li 3 V 2 O 5 , Li 3+x V 2 O 5 , Li 3 MoO 4 , Li 5 W 2 O 7 , or any combination thereof.
- a metal oxide such as Li 4 Ti 5 O 12 , TiO 2 , TiNb 2 O 7 , Nb 2 O 5 , Li 3 VO 4 , H 2 Ti 6 O 13 , LiMnBO 3 , LiV 0.5 Ti 0.5 S 2 , Li 3 V 2 O 5 , Li 3+x V 2 O 5 , Li 3 MoO 4 , Li 5 W 2 O 7 , or any combination thereof.
- a battery according to the present disclosure does not comprise an anode.
- a battery according to the present disclosure comprises an anode current collector in contact with an anode.
- the anode current collector is in contact with the anode, such that the anode is between the anode current collector and the electrolyte.
- the anode current collector comprises a metal or metal alloy.
- the anode current collector comprises, by way of non-limiting example, copper, a form of copper, a copper alloy, nickel, a form of nickel, a nickel alloy, duplex steel, stainless steel, silver, a form of silver, a silver alloy, or any combination thereof.
- a battery according to the present disclosure comprises an anode current collector but does not comprise an anode.
- the anode current collector is disposed on the electrolyte such that the electrolyte is between the cathode and the anode current collector.
- the anode current collector is the exterior housing (or casing) of the battery.
- a battery according to the present disclosure comprises a separator.
- the separator is between the cathode and the anode. In some embodiments, the separator is in contact with the electrolyte. In some embodiments, the separator is between the anode current collector and the cathode (e.g., when the battery does not comprise an anode).
- the separator comprises a polymer film (e.g., polyethylene, polypropylene, poly(tetrafluoroethylene), poly (vinyl chloride), etc.) nonwoven fibers (e.g., nylon, polyesters, glass, etc.), a glass, a ceramic, or any combination thereof.
- the separator comprises glass fiber.
- the separator comprises a surfactant coating or treatment therein or thereon to enhance wettability of a liquid-based electrolyte.
- a battery according to the present disclosure comprises one or both of a plasticizer and a carboxylic acid in the electrolyte and/or the electrode (anode, cathode) materials.
- the plasticizer comprises, by way of non-limiting example, succinonitrile, glutaronitrile, adiponitrile, ethylene carbonate, propylene carbonate, dimethylformamide, dimethyl sulfoxide, ⁇ -butyrolactone, sulfolane, 3-methyl-2-oxazolidinone, butylene carbonate, phthalate derivatives, trimellitates, adipates, sebacates, maleates, or any combination thereof.
- the plasticizer comprises succinonitrile (SN).
- the carboxylic acid may be present to facilitate ion transport in and out of cathode active material.
- the carboxylic acid can be a monocarboxylic acid or a polycarboxylic acid.
- the carboxylic acid is a polycarboxylic acid, it may be oxalic acid.
- a battery according to the present disclosure comprises a polymeric compound in the electrolyte and/or the electrode (anode, cathode) materials.
- the one or more polymer additives comprise(s), by way of non-limiting example, polycaprolactone, poly(acrylic acid), poly(methyl methacrylate), polytetrafluoroethylene, poly(vinylidene fluoride), polyacrylonitrile, poly(ethylene terephthalate), polyvinylpyrrolidone, poly(4-vinylpyridine), polyvinyl chloride, polyvinyl alcohol, polyvinyl acetate, polyethylene, polypropylene, polylactic acid, polyvinyl butyral, polystyrene, polyurethane, polycarbonate, or any combination thereof.
- the polymeric compound comprises poly (ethylene oxide) (“PEO”).
- a battery includes greenhouse gas within the battery.
- the battery is fabricated under a greenhouse gas atmosphere, or the greenhouse gas is introduced into the battery before use.
- the electrolyte and/or electrode (anode, cathode) materials are in contact with the greenhouse gas.
- the greenhouse gas comprises, by way of non-limiting example, carbon dioxide (CO 2 ), carbon monoxide (CO), ozone (O 3 ), methane (CH 4 ), tetrafluoromethane (CF 4 ), hexafluoroethane (C 2 F 6 ), sulfur hexafluoride (SF 6 ), carbon tetrachloride (CCl 4 ), nitrous oxide (N 2 O), sulfur dioxide (SO 2 ), carbon disulfide (CS 2 ), and carbonyl sulfide (COS), one or more perfluorocarbons, one or more chlorofluorocarbons, one or more hydrofluorocarbons, or any combination thereof.
- the greenhouse gas is not intended to be used as an active material. In some embodiments, the greenhouse gas is consumed or dissolved at a rate of less than 1 mg per 1 mAh, less than 0.9 mg per 1 mAh, less than 0.8 mg per 1 mAh, less than 0.7 mg per 1 mAh, less than 0.6 mg per 1 mAh, less than 0.5 mg per 1 mAh, less than 0.4 mg per 1 mAh, less than 0.3 mg per 1 mAh, less than 0.2 mg per 1 mAh, less than 0.1 mg per 1 mAh, less than 0.09 mg per 1 mAh, less than 0.08 mg per 1 mAh, less than 0.07 mg per 1 mAh, less than 0.06 mg per 1 mAh, less than 0.05 mg per 1 mAh, less than 0.04 mg per 1 mAh, less than 0.03 mg per 1 mAh, less than 0.02 mg per 1 mAh, less than 0.01 mg per 1 mAh, less than 9 ⁇ g per 1 mAh, less than 8 ⁇ g per 1 mAh, less than 7 ⁇ g per
- the term “full lifecycle of the battery” is intended to mean that the life of the battery is considered to have exceeded its normal useful life, which is assumed here to be the point at which the battery shows 80% of its original capacity for the first time.
- the greenhouse gas is consumed or dissolved at a rate of less than 0.01 mg per 1 mAh, on average during the full lifecycle of the battery.
- the battery is fabricated in an atmosphere comprising, consisting essentially of, or consisting of a greenhouse gas. In some embodiments, the battery is constructed in an atmosphere that does not comprise a greenhouse gas, and the atmosphere that does not comprise a greenhouse gas is purged from the internal atmosphere of the battery and is replaced by a greenhouse gas, after the battery is fabricated.
- a greenhouse gas is dissolved in an electrolyte (e.g., liquid electrolyte) using an apparatus comprising a pressure gauge, a gas inlet, a gas outlet, and a chemically resistant frit or foam submerged in the liquid electrolyte.
- the liquid electrolyte is kept under a greenhouse gas at a pressure above a standard atmospheric pressure for at least 10 seconds, at least 20 seconds, at least 30 seconds, at least 40 seconds, at least 50 seconds, at least 60 seconds, at least 70 seconds, at least 80 seconds, at least 90 seconds, at least 100 seconds, or longer, or any range or value therein.
- the liquid electrolyte is kept under a greenhouse gas at a pressure of at least 1 bar, at least 2 bar, at least 3 bar, at least 4 bar, at least 5 bar, at least 6 bar, at least 7 bar, at least 8 bar, at least 9 bar, at least 10 bar, at least 15 bar, at least 20 bar, at least 25 bar, at least 30 bar, at least 35 bar, at least 40 bar, at least 45 bar, at least 50 bar, at least 55 bar, at least 60 bar, at least 65 bar, at least 70 bar, at least 75 bar, at least 80 bar, at least 85 bar, at least 90 bar, at least 95 bar, at least 100 bar, or any range or value therein.
- the greenhouse gas may be at a pressure at which it is liquefied.
- the greenhouse gas atmosphere is a “greenhouse gas-rich atmosphere.”
- the greenhouse gas-rich atmosphere comprises one or more greenhouse gases at a total concentration of at least 10 vol. %, at least 15 vol. %, at least 20 vol. %, at least 25 vol. %, at least 30 vol. %, at least 35 vol. %, at least 40 vol. %, at least 45 vol. %, at least 50 vol. %, at least 55 vol. %, at least 60 vol. %, at least 65 vol. %, at least 70 vol. %, at least 75 vol. %, at least 80 vol. %, at least 85 vol. %, at least 90 vol. %, at least 91 vol.
- a battery includes an inert gas within the battery.
- the battery is fabricated under an inert gas atmosphere, or the inert gas is introduced into the battery before use.
- the electrolyte and/or electrode (anode, cathode) materials are in contact with the inert gas.
- the inert gas comprises, by way of non-limiting example, nitrogen, argon, helium, neon, argon, krypton, xenon, radon, or any combination thereof
- the battery is fabricated in an atmosphere comprising, consisting essentially of, or consisting of an inert gas. In some embodiments, the battery is constructed in an atmosphere that does not comprise an inert gas, and the atmosphere that does not comprise an inert gas is purged from the internal atmosphere of the battery and is replaced by an inert gas, after the battery is fabricated.
- an inert is dissolved in an electrolyte (e.g., liquid electrolyte) using an apparatus comprising a pressure gauge, a gas inlet, a gas outlet, and a chemically resistant frit or foam submerged in the liquid electrolyte.
- the liquid electrolyte is kept under an inert gas at a pressure above a standard atmospheric pressure for at least 10 seconds, at least 20 seconds, at least 30 seconds, at least 40 seconds, at least 50 seconds, at least 60 seconds, at least 70 seconds, at least 80 seconds, at least 90 seconds, at least 100 seconds, or longer, or any range or value therein.
- the inert gas atmosphere is an “inert gas-rich atmosphere.”
- the inert gas-rich atmosphere comprises one or more inert gases at a total concentration of at least 10 vol. %, at least 15 vol. %, at least 20 vol. %, at least 25 vol. %, at least 30 vol. %, at least 35 vol. %, at least 40 vol. %, at least 45 vol. %, at least 50 vol. %, at least 55 vol. %, at least 60 vol. %, at least 65 vol. %, at least 70 vol. %, at least 75 vol. %, at least 80 vol. %, at least 85 vol. %, at least 90 vol. %, at least 91 vol.
- batteries prepared according to the present disclosure, and related fabrication methods may include any combination of the above components.
- a battery according to the present disclosure comprises an electrolyte comprising an aliphatic nitrile compound, a cathode that comprises a halogenated compound as a cathode active material, and an anode that comprises a metal oxide as an anode active material.
- the battery may optionally comprise one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- a battery according to the present disclosure comprises an electrolyte comprising at least three carbonate compounds, a cathode comprising a halogenated compound as a cathode active material, and an anode comprising a non-metal oxide as an anode active material.
- the battery may optionally comprise one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- a battery according to the present disclosure comprises a liquid electrolyte comprising a dissolved greenhouse gas.
- the greenhouse gas is introduced into the liquid electrolyte by using a gas dispersion tubing and is kept above a standard atmospheric pressure.
- the battery may further comprise a cathode comprising a halogenated compound and/or an electroactive organic material.
- the battery may optionally comprise one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- a battery according to the present disclosure comprises a greenhouse gas atmosphere within the battery.
- the greenhouse gas is not intended to be used as an active material.
- the greenhouse gas is the greenhouse gas is excluded from an electrochemical reaction during one or more of charging and discharging of the battery.
- the greenhouse gas is in contact with the electrode and the electrolyte.
- the electrolyte may be solid.
- the electrolyte may be liquefied gas.
- the battery may also include one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- an apparatus for dissolving greenhouse gas in a liquid electrolyte includes a pressure gauge, a gas inlet, a gas outlet, and a chemically resistant frit or foam submerged in the liquid electrolyte and coupled to the gas inlet.
- the liquid electrolyte is kept under a greenhouse gas above a standard atmospheric pressure for more than 30 seconds.
- a battery according to the present disclosure comprises a cathode current collector.
- the cathode current collector is in contact with the cathode comprising a halogenated compound.
- the current collector may be perforated, wherein the pore size may be 500 nm or above and the distance between pores be 10 ⁇ m or above.
- a battery in an embodiment, includes an electrolyte additive comprising a heterocyclic compound with a nitrogen atom in its ring and a cathode that comprises a halogenated compound as a cathode active material.
- the battery may also include one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- the battery may include an anode that comprises a material selected from the group consisting of lithium, sodium, potassium, magnesium, calcium, vanadium, aluminum, zinc, silicon, graphite, graphene, porous carbon, activated carbon, a form of silicon, a metal oxide and combinations thereof.
- a method of fabricating a battery includes forming a battery stack comprising a cathode comprising a cathode active material incorporated onto an electrically conductive material, and an electrolyte positioned in and on the cathode.
- the method also includes introducing greenhouse gas into the battery stack.
- the electrolyte is in contact with the cathode and the greenhouse gas.
- the battery may perform at least one charge and/or discharge operation under the greenhouse gas at a current density of 0.1 mA/cm 2 or below before use.
- a method of fabricating a battery includes forming a battery stack in a greenhouse gas-rich atmosphere.
- the battery includes a cathode comprising a cathode active material incorporated onto an electrically conductive material, and an electrolyte positioned in and on the cathode.
- the electrolyte is in contact with the cathode and the greenhouse gas.
- the battery may perform at least one charge and/or discharge operation under the greenhouse gas at a current density of 0.1 mA/cm 2 or below before use.
- FIG. 1 illustrates a schematic view of a battery 100 according to an exemplary embodiment.
- the battery includes an exterior housing 114 containing a gaseous material or internal atmosphere 112 (e.g., carbon dioxide, carbon monoxide, nitrous oxide, nitrogen, argon, methane, ozone, chlorofluorocarbons, hydrofluorocarbons, or combinations thereof), an anode current collector 104 (e.g., copper, a form of copper, a copper alloy, nickel, a form of nickel, a nickel alloy, duplex steel, stainless steel, silver, a form of silver, a silver alloy, or combinations thereof), an anode 110 (e.g., lithium, sodium, potassium, magnesium, calcium, vanadium, aluminum, zinc, silicon, graphite, graphene, porous carbon, activated carbon, a form of silicon, a metal oxide, or combinations thereof), an electrolyte 106 comprising a heterocyclic compound with at least one nitrogen atom in its ring (e.g.,
- the electrolyte 106 may be larger in its width and length than the current collector 102 , 104 to avoid a contact between the anode and the cathode.
- the battery can be formed as in button cells, pouch cells, prismatic cells, cylindrical cells, flow cells, in alternating plates, or in jelly rolls, among others.
- the battery 100 in the embodiment shown in FIG. 1 includes a halogenated compound as a cathode active material and a heterocyclic compound with at least one nitrogen atom in its ring as an electrolyte material.
- the electrolyte 106 is positioned in and between the anode 110 and the cathode 108 .
- the battery may also include one or both of a plasticizer and a carboxylic acid as part of the cathode, anode, and/or electrolyte materials.
- the battery may operate without an anode 110 .
- the electrolyte is positioned in the cathode 108 and between the anode current collector 104 and the cathode 108 .
- FIG. 2 illustrates a schematic view of a battery 200 according to an exemplary embodiment.
- the battery includes an exterior housing 214 containing a gaseous material or internal atmosphere 212 (e.g., carbon dioxide, carbon monoxide, nitrous oxide, nitrogen, argon, methane, ozone, chlorofluorocarbons, hydrofluorocarbons), an anode current collector 204 (e.g., copper, a form of copper, a copper alloy, nickel, a form of nickel, a nickel alloy, duplex steel, stainless steel, silver, a form of silver, a silver alloy), a metal oxide anode 210 (e.g., Li 4 Ti 5 O 12 , TiO 2 , TiNb 2 O 7 , Nb 2 O 5 , Li 3 VO 4 , H 2 Ti 6 O 13 , LiMnB 0 3 , LiV 0.5 Ti 0.5 S 2 , Li 3 V 2 O 5 , Li 3+x V 2 O 5 , Li 3 MoO 4
- the electrolyte 206 may be larger in its width and length than the anode current collector 204 or cathode current collector 202 to avoid a contact between the anode 210 and the cathode 208 .
- the battery can be formed as in button cells, pouch cells, prismatic cells, cylindrical cells, flow cells, in alternating plates, or in jelly rolls, among others.
- the battery 200 in the embodiment shown in FIG. 2 includes a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte material, and a metal oxide as an anode active material.
- the electrolyte 206 is positioned in and between the anode 210 and the cathode 208 .
- the battery 200 may also include one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- FIG. 3 illustrates a schematic view of a battery 300 according to an exemplary embodiment.
- the battery 300 includes an exterior housing 314 containing a gaseous material or internal atmosphere 312 (e.g., carbon dioxide, carbon monoxide, nitrous oxide, nitrogen, argon, methane, ozone, chlorofluorocarbons, hydrofluorocarbons), an anode current collector 304 (e.g., copper, a form of copper, a copper alloy, nickel, a form of nickel, a nickel alloy, duplex steel, stainless steel, silver, a form of silver, a silver alloy), a non-metal oxide anode 310 (e.g., silicon, graphite, graphene, porous carbon, activated carbon, a form of silicon), an electrolyte 306 comprising at least three carbonate compounds (e.g.
- a gaseous material or internal atmosphere 312 e.g., carbon dioxide, carbon monoxide, nitrous oxide, nitrogen, argon, me
- a cathode 308 comprising a halogenated compound
- a cathode current collector 302 e.g., aluminum, a form of aluminum, aluminum alloy, nickel, a form of nickel, nickel alloy, duplex steel, stainless steel, titanium, a form of titanium, titanium alloy, or any combination thereof.
- the electrolyte 306 may be larger in its width and length than the anode current collector 304 or cathode current collector 302 to avoid a contact between the anode and the cathode.
- the battery can be formed as in button cells, pouch cells, prismatic cells, cylindrical cells, flow cells, in alternating plates, or in jelly rolls, among others.
- the battery 300 in the embodiment shown in FIG. 3 includes a halogenated compound as a cathode active material, a non-metal oxide material as an anode active material, and at least three carbonate compounds as an electrolyte material.
- the electrolyte 306 is positioned in and between the anode 310 and the cathode 308 .
- the battery may also include one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte material.
- FIG. 4 illustrates a schematic view of a battery 400 according to an exemplary embodiment.
- the battery includes an exterior housing 414 containing a greenhouse gas 412 (e.g., carbon dioxide (CO 2 ), carbon monoxide (CO), ozone (O 3 ), methane (CH 4 ), tetrafluoromethane (CF 4 ), hexafluoroethane (C 2 F 6 ), sulfur hexafluoride (SF 6 ), carbon tetrachloride (CCl 4 ), nitrous oxide (N 2 O), sulfur dioxide (SO 2 ), carbon disulfide (CS 2 ), and carbonyl sulfide (COS), or any combination thereof), an anode current collector 404 (e.g., copper, a form of copper, a copper alloy, nickel, a form of nickel, a nickel alloy, duplex steel, stainless steel, silver, a form of silver, a silver alloy, or any combination thereof), an anode 410 (e.g.,
- the electrolyte 406 may be larger in its width and length than the cathode current collector 402 or the anode current collector 404 to avoid a contact between the anode 410 and the cathode 408 .
- the battery can be formed as in button cells, pouch cells, prismatic cells, cylindrical cells, flow cells, in alternating plates, or in jelly rolls, among others.
- the atmosphere 412 of the battery in the embodiment shown in FIG. 4 includes a greenhouse gas wherein the carbon dioxide is not used as an active material.
- the greenhouse gas is the greenhouse gas is excluded from an electrochemical reaction during one or more of charging and discharging of the battery.
- the greenhouse gas 412 is in contact with the cathode 408 , anode 410 , and the electrolyte 406 .
- the greenhouse gas is on the surface, in the pores, and on the interface among the cathode 408 and the electrolyte 406 materials.
- the battery 400 may also include a solid-state electrolyte.
- the battery 400 may also include a halogenated compound as a cathode material.
- the battery may also include a perforated current collector 402 with the pore size of 500 nm or above and the distance between pores of 10 ⁇ m or above.
- the battery may also include one or both of a plasticizer and a carboxylic acid as part of the cathode 408 , anode 410 , and electrolyte 406 material.
- the battery 400 may operate without an anode 410 .
- the electrolyte 406 is positioned in the cathode 408 and between the anode current collector 404 and the cathode 408 .
- the present disclosure also relates to methods for fabricating batteries as disclosed above.
- the battery electrolyte material comprises a dissolved greenhouse gas which is introduced into the electrolyte before including the electrolyte in the battery.
- an apparatus 500 for dissolving greenhouse gas in a liquid electrolyte 502 comprises a pressure gauge 504 , a gas inlet 506 , a gas outlet 508 , and a chemically resistant frit or foam 510 coupled to the gas inlet 506 and submerged in the liquid electrolyte 502 .
- the liquid electrolyte 502 is kept under greenhouse gas 512 above a standard atmospheric pressure for more than 30 seconds.
- standard atmospheric pressure is intended to mean a unit of pressure defined as 101,325 Pa, which is equivalent to 760 mm Hg, 29.9212 inches Hg, 14.696 psi, or 1.013 bar.
- FIG. 6 is a flow chart of a method 600 of fabricating a battery according to an exemplary embodiment.
- Fabricating the battery starts with a step of inserting 602 all the cell components into an exterior housing in the order of an anode current collector, an anode, an electrolyte, a cathode, and a cathode current collector or vice versa.
- the second step is to compress 604 the cell components with a press so that the electrolyte is homogeneously in contact with the active anode and cathode materials. The amount of pressure needs to be controlled in order forthe anode and the cathode to be clearly separated.
- the third step is to assemble and close 606 the cell in a greenhouse gas rich atmosphere.
- the greenhouse gas in the battery is expected to chemically and/or electrochemically generate a protective layer on the surface of the anode active material, the cathode active material, and/or the electrolyte materials that is beneficial to lower the interfacial and/or charge transfer resistance.
- the protective layer may comprise one or more of carbon, sulfur, and oxygen.
- the protective layer may preferably comprise carbon and oxygen.
- the protective layer may be electrically insulating at room temperature.
- the term “electrically insulating” is intended to mean that a material has an electrical conductivity of less than 10 ⁇ 2 S/cm, preferably less than 10 ⁇ 4 S/cm, and more preferably, less than 10 ⁇ 6 S/cm.
- the use of greenhouse gas can also add electroactive functional groups on the surface of the electrode materials and/or redesign the chemical structure of the electrode materials that may contribute to storing more energy per a unit mass or area of the electrode.
- the fourth step is to charge and/or discharge 608 the battery at least one time. The charging and/or discharging of the battery may be done at a current density of 0.1 mA/cm 2 or below.
- the fifth step is to reopen the battery to lower pressure and to displace 610 a forming gas generated during the charge and/or discharge with the greenhouse gas, with the goal of removing the forming gas from within the battery (some other gases in addition to greenhouse gas may be present at the conclusion of this step).
- the sixth step is to reassemble and close 612 the cell under the greenhouse gas rich atmosphere.
- the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less (e.g., room temperature).
- FIG. 7 is a flow chart of a method 700 of fabricating a battery according to another exemplary embodiment.
- Fabricating the battery starts with a step of inserting 702 all the cell components into an exterior housing in the order of an anode current collector, an anode, an electrolyte, a cathode, and a cathode current collector or vice versa.
- the second step is to compress 704 the cell components with a press so that the electrolyte is homogeneously in contact with the active anode and cathode materials. The amount of pressure needs to be controlled in order for the anode and the cathode to be clearly separated.
- the third step is to assemble and close 706 the cell.
- the fourth step 708 comprises purging through quick connectors on inlet and outlet feeds of the exterior housing and introducing a greenhouse gas to the cell components.
- the fifth step is to charge and/or discharge 710 the battery at least one time. The charging and/or discharging of the battery may be done at a current density of 0.1 mA/cm 2 or below.
- the sixth step is to reopen the cell and displace 712 a forming gas generated during the charge and/or discharge with the greenhouse gas, with the goal of removing the forming gas from within the battery (some other gases in addition to greenhouse gas may be present at the conclusion of this step).
- the seventh step is to reassemble and close 714 the cell under the greenhouse gas atmosphere.
- the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less (e.g., room temperature).
- FIG. 8 is a flow chart of a method 800 of fabricating a battery according to another exemplary embodiment. Fabricating the battery starts with a step of inserting 802 all the cell components into an exterior housing in the order of an anode current collector, an anode, an electrolyte, a cathode, and a cathode current collector or vice versa.
- the second step is to compress 804 the cell components with a press so that the electrolyte is homogeneously in contact with the active anode and cathode materials. The amount of pressure needs to be controlled in order for the anode and the cathode to be clearly separated.
- the third step is to assemble and close 806 the cell in a greenhouse gas rich atmosphere.
- the fourth step is to charge and/or discharge 808 the battery at least one time.
- the charging and/or discharging of the battery may be done at a current density of 0.1 mA/cm 2 or below.
- the fifth step is to reopen the cell and displace 810 a forming gas generated during the charge and/or discharge with an inert gas such argon or nitrogen, with the goal of removing the forming gas from within the battery (some other gases in addition to the inert gas may be present at the conclusion of this step).
- the sixth step is to reassemble and close 812 the cell under the inert gas atmosphere.
- the inert gas such as argon or nitrogen may reduce the risk of having structural disorder of the electrode and the electrolyte materials of the battery when cycling many times.
- the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less (e.g., room temperature).
- FIG. 9 is a flow chart of a method 900 of fabricating a battery according to another exemplary embodiment.
- Fabricating the battery starts with a step of inserting 902 all the cell components into an exterior housing in the order of an anode current collector, an anode, an electrolyte, a cathode, and a cathode current collector or vice versa.
- the second step is to compress 904 the cell components with a press so that the electrolyte is homogeneously in contact with the active anode and cathode materials. The amount of pressure needs to be controlled in order for the anode and the cathode to be clearly separated.
- the third step is to assemble and close 906 the cell.
- the fourth step involves purging through quick connectors on inlet and outlet feeds of the exterior housing and introducing 908 a greenhouse gas to the cell components.
- the fifth step is to charge and/or discharge 910 the battery at least one time. The charging and/or discharging of the battery may be done at a current density of 0.1 mA/cm 2 or below.
- the sixth step is to reopen the cell and displace 912 a forming gas generated during the charge and/or discharge with an inert gas such as argon or nitrogen, with the goal of removing the forming gas from within the battery (some other gases in addition to the inert gas may be present at the conclusion of this step).
- the seventh step is to reassemble and close 914 the cell under the inert gas atmosphere.
- the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less (e.g., room temperature).
- Batteries according to the present disclosure were assembled by the following procedure.
- a solution including 1 mmol 1,2,4,5-benzenetetramine tetrahydrochloride, 1 mmol hexaketocyclohexane octahydrate, 1M lithium iodide and 50 mmol succinonitrile in 10 mL of diethyl ether was drop-cast onto a 316L stainless steel mesh current collector with the wire diameter of 0.05 mm and the aperture of 0.08 mm.
- the current collector had been coated via electrospraying with a conductive porous carbon film with a thickness of about 110 ⁇ m.
- the current collector was dried under vacuum at room temperature (approximately 25° C.) for 12 hours.
- the batteries used lithium titanate (Li 4 Ti 5 O 12 ) as an insertion-type metal oxide anode.
- the lithium titanate electrode had a thickness of approximately 150 ⁇ and a porosity of approximately 60%.
- nitrile-based electrolyte solutions Example 1: 1M lithium bistrifluoromethanesulfonimidate (LiTFSI) in MPN; Example 2: 1M LiTFSI-MAN; Example 3: 1M LiTFSI-AN; Example 4: 1M LiTFSI-AN-VN (85:15 in volume ratio)
- Example 1M lithium hexafluorophosphate (LiPF 6 ) in EC-DEC (50:50 volume ratio) were prepared to test in comparison to a similar battery having a conventional carbonate-based electrolyte.
- FIG. 10 shows a plot illustrating the high-rate capability of a battery comprising a halogenated compound as a cathode active material, a metal oxide as an anode active material, an aliphatic nitrile compound as an electrolyte, a plasticizer, a carboxylic acid and carbon dioxide.
- the “rate capability” is defined as the current divided by the theoretical current draw under which the battery would deliver its nominal rated capacity in one hour.
- the unit “C” is intended to mean a C-rate that is a measure of the rate at which a battery is being charged or discharged with 90% of its original specific capacity.
- batteries according to the present disclosure (Examples 1-4) showed markedly higher rate capability up to 20 mA/cm2 ( ⁇ 20 C) than a similar battery prepared using a conventional electrolyte (Comparative Example 1).
- a battery was prepared in a manner similar to Example 2 above, comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, oxalic acid as a carboxylic acid, succinonitrile as a plasticizer, a lithium metal anode, and carbon dioxide internal atmosphere.
- the electrolyte used in Example 5 was 1M LiTFSI-MAN with 5 wt. % of 1-methylbenzimidazole (MIB) as electrolyte additive.
- MIB 1-methylbenzimidazole
- FIG. 11 is a plot of voltage versus specific capacity illustrating the low-temperature performance of Example 5.
- the battery achieved nearly 40% of its capacity at room temperature when the battery operated at the temperature of ⁇ 70° C., demonstrating the ability of batteries according to the present disclosure to achieve relatively high capacity at low operating temperatures.
- FIG. 12 compares the specific capacity at low temperature of Example 5 (1M LiTFSI-MAN with 5 wt. % of 1-methylbenzimidazole (MIB)) to that observed for an equivalent battery (Comparative Example 2) prepared using 1 M LiPF 6 in EC-DEC as the electrolyte material, NMC111 (LiNi 0.33 Mn 0.33 Co 0.33 O 2 ) as the cathode material, and Li metal as the anode material. As shown in FIG. 12 , batteries according to the present disclosure exhibit higher specific capacity at low operating temperature when compared to conventional batteries.
- MIB 1-methylbenzimidazole
- lithium-ion batteries were prepared using a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, and further including a plasticizer, a carboxylic acid and carbon dioxide internal atmosphere.
- a solution including lithium iodide, oxalic acid and succinonitrile in diethyl ether was dropcast onto a 316L stainless steel mesh current collector that had coated with a conductive porous carbon via electrospraying.
- the current collector with the casted solution was then dried under vacuum at room temperature for 12 hours.
- Four different heterocyclic compounds were used as the electrolyte additive (Example 6: 4-tert-butylpyridine (TBP); Example 7: 2,2′-bipyridine (BPY); Example 8: 1-methylimidazole (MI); and Example 9: 1-methylbenzimidazole (MIB)).
- TBP 4-tert-butylpyridine
- BPY 2,2′-bipyridine
- MI 1-methylimidazole
- MIB 1-methylbenzimidazole
- the electrolyte comprised dissolved carbon dioxide. After cell assembly within an argon-filled glovebox ( ⁇ 0.1 ppm O 2 , ⁇ 0.1 ppm H 2 O), each cell was removed from the glovebox, purged, and filled with carbon dioxide.
- FIG. 13 is a plot showing the specific capacity of Examples 6-9, with respect to the amount of the electrolyte additive.
- Examples 6-9 demonstrated relatively high specific capacity over 160 mAh/g, with the use of 0.2 M or above of their respective heterocyclic compounds in the electrolyte solution.
- Example 7 BPY
- each cell showed a maximum specific capacity at an electrolyte additive concentration of approximately 0.3 M.
- batteries were prepared in the same manner as described above for Examples 1-9, using four different heterocyclic compounds as electrolyte additives.
- a solution including lithium iodide and succinonitrile in diethyl ether was dropcast onto a 316L stainless steel mesh current collector that had been coated with a conductive porous carbon via electrospraying.
- the current collector with the casted solution was then dried under vacuum at room temperature for 12 hours.
- Comparative Example 3 is a battery prepared in the same manner as above, having succinonitrile (SN) as an electrolyte additive.
- Comparative Example 4 includes polyethylene oxide (PEO) as an electrolyte additive.
- Comparative Example 5 has no electrolyte additive. In each battery, the electrolyte comprised dissolved carbon dioxide. After cell assembly within an argon-filled glovebox ( ⁇ 0.1 ppm O 2 , ⁇ 0.1 ppm H 2 O), each cell was removed from the glovebox, purged, and filled with carbon dioxide.
- FIG. 14 plots operating discharge voltage for batteries with different electrolyte additives.
- the data show an increase in the average operating voltage for TBP, BPY, MI, MIB as the electrolyte additive, while SN and PEO afforded very little increase in operating voltage over batteries having no electrolyte additive at all.
- the data shows batteries according the present disclosure achieve high average operating discharge voltage of 3.1V or above with the use of the heterocyclic compound in the electrolyte solution.
- oxidation and reduction peak currents were measured under argon and carbon dioxide atmosphere.
- Batteries were prepared in the same manner as described above for Examples 1-9.
- a solution including lithium iodide and succinonitrile in diethyl ether was dropcast onto a 316L stainless steel mesh current collector that had been coated with a conductive porous carbon via electrospraying.
- the current collector with the casted solution was then dried under vacuum at room temperature for 12 hours. MIB was used as the electrolyte additive.
- Example 12 After cell assembly within an argon-filled glovebox ( ⁇ 0.1 ppm O 2 , ⁇ 0.1 ppm H 2 O), one cell was removed from the glovebox, purged, and filled with carbon dioxide (Example 11), while the argon atmosphere was left intact for the other cell (Example 12).
- FIG. 15 shows the electrochemical utilization by plotting oxidation and reduction currents at different sweep rates for Example 11 (CO 2 ) and Example 12 (Ar).
- Example 11 (CO 2 ) exhibited higher oxidation and reduction peak currents at all sweep rates, when compared to a battery operated under argon (Example 12). The result shows that the presence of carbon dioxide improves the utilization of the active electrode materials.
- batteries were prepared using electrolytes that had been prepared under different carbon dioxide gas overpressures, with higher overpressures corresponding to higher concentrations of dissolved carbon dioxide gas in the electrolyte. Batteries were prepared in the same manner as described above for Examples 1-12, with MIB as the electrolyte additive. However, for each battery, the electrolyte material was exposed to a different carbon dioxide overpressure to dissolve different concentrations of carbon dioxide in the electrolyte ( FIG. 5 ). The electrolyte solution was kept under the carbon dioxide atmosphere for 1 hour for each pressure. Cell assembly was carried out in an argon-filled glovebox ( ⁇ 0.1 ppm O 2 , ⁇ 0.1 ppm H 2 O).
- FIG. 16 shows an increase in the specific capacity of batteries according to the present disclosure, as a function of the carbon dioxide pressure used to dissolve carbon dioxide in the electrolyte.
- specific capacity shows a sharp increase with small pressure increases, indicating an increase concentration of dissolved CO 2 enhances the specific capacity of the battery.
- the battery exhibited its highest specific capacity of over 150 mAh/g with the carbon dioxide pressure of 10 bar or greater for the liquid electrolyte storage. Increased carbon dioxide pressure beyond 10 bar provided minimal, if any, increase in specific capacity.
- batteries were prepared in the same manner as described above for Examples 1-12, with MIB as the electrolyte additive. However, for each battery, the internal carbon dioxide pressure inside the cell was varied when the cell was removed from the glovebox, purged, and filled with carbon dioxide gas.
- FIG. 17 shows the increase in the specific capacity of a battery with respect to the carbon dioxide pressure in the cell atmosphere.
- the battery demonstrated its highest specific capacity of over 160 mAh/g at the carbon dioxide pressure of 1 bar or greater in the cell atmosphere.
- batteries were prepared in the same manner as described above for Examples 1-12, with MIB as the electrolyte additive. However, for each battery, the internal carbon dioxide pressure inside the cell was varied when the cell was removed from the glovebox, purged, and filled with carbon dioxide gas.
- FIG. 18 shows the decrease in self-discharge rate of batteries according to the present disclosure with respect to the carbon dioxide pressure in the cell atmosphere.
- the battery demonstrated its lowest self-discharge rate of approximately 5 mV/h at an internal carbon dioxide pressure of 1 bar or greater.
- batteries were prepared in the same manner as described above for Examples 1-12, but with varied concentrations of succinonitrile (SN) as the plasticizer material in the cathode active material.
- SN succinonitrile
- FIG. 19 plots the increase in the specific capacity and the coulombic efficiency of a battery with respect to the plasticizer concentration.
- the term “coulombic efficiency” is intended to mean the ratio of the total charge extracted from the battery to the total charge put into the battery over a full cycle.
- the battery exhibited its highest specific capacities of 160 mAh/g or greater and coulombic efficiencies near or exceeding 98% when the plasticizer was present at a concentration of 2%. At higher plasticizer concentrations, the coulombic efficiency remained steady, while the specific capacity decreased markedly when the plasticizer concentration exceeded about 3%.
- FIG. 20 plots the self-discharge rate as a function of plasticizer concentration.
- the battery demonstrated its lowest self-discharge rates of approximately 5 mV/h when the plasticizer concentration exceeded about 3 wt. % of the cathode composition.
- batteries were prepared in the same manner as disclosed above for Examples 1-12, with the addition of PEO to the electrolyte.
- a solution including lithium iodide and succinonitrile in diethyl ether was dropcast onto a 316L stainless steel mesh current collector that had coated with a conductive porous carbon via electrospraying.
- the current collector with the casted solution was then dried under vacuum at room temperature for 12 hours.
- 0.9M LiPF 6 EC-DEC-DMC-EMC (1:1:1:3 in a volume ratio) quaternary carbonate electrolyte solution was used to test the cycle life of the battery at 0° C. operating temperature.
- MI was selected for the heterocyclic electrolyte additive, oxalic acid as a carboxylic acid, and succinonitrile for the plasticizer.
- Poly(ethylene oxide) (PEO) was added to the electrolyte at a concentration of 1 wt. %.
- the electrolyte comprised dissolved carbon dioxide.
- the cell assembly was done in an argon-filled glovebox ( ⁇ 0.1 ppm O 2 , ⁇ 0.1 ppm H 2 O), and the cell was purged and introduced with carbon dioxide outside of the glovebox.
- FIG. 21 is a plot showing the superior cycle life at an operating temperature of 0° C., for a battery comprising a halogenated compound as a cathode active material, an electrolyte comprising three carbonate compounds, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a polymeric additive, succinonitrile as a plasticizer, oxalic acid as a carboxylic acid and a carbon dioxide atmosphere.
- the battery demonstrated its superior cycle number of 2,000 relative to a battery lacking PEO or a plasticizer.
- the present disclosure has described the use of various features and methods for producing batteries. It should be understood that any combination of such features and methods are within the scope of the present disclosure.
- an embodiment that describes the use of a halogenated compound for the cathode active material may be modified to be produced under a greenhouse gas-rich atmosphere, and such modification is intended to be within the scope of the present disclosure.
- Other permutations and combinations that utilize one or more of the features/methods described herein are also possible, and such permutations and combinations are also considered part of the present disclosure without enumerating them specifically.
- the terms “approximately,” “about,” “substantially,” and similar terms generally mean +/ ⁇ 10% of the disclosed values, unless specified otherwise.
- the terms “approximately,” “about,” “substantially,” and similar terms are meant to cover minor variations in structure that may result from, for example, the manufacturing or assembly process and are intended to have a broad meaning in harmony with the common and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alterations of the subject matter described and claimed are considered to be within the scope of the disclosure as recited in the appended claims.
- Coupled means the joining of two members directly or indirectly to one another. Such joining may be stationary (e.g., permanent or fixed) or moveable (e.g., removable or releasable). Such joining may be achieved with the two members coupled directly to each other, with the two members coupled to each other using a separate intervening member and any additional intermediate members coupled with one another, or with the two members coupled to each other using an intervening member that is integrally formed as a single unitary body with one of the two members.
- Coupled or variations thereof are modified by an additional term (e.g., directly coupled)
- the generic definition of “coupled” provided above is modified by the plain language meaning of the additional term (e.g., “directly coupled” means the joining of two members without any separate intervening member), resulting in a narrower definition than the generic definition of “coupled” provided above.
- Such coupling may be mechanical, electrical, or fluidic.
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Abstract
Description
- This application claims the benefit of and priority to U.S. Provisional Patent Application Ser. No. 63/080,161, filed Sep. 18, 2020, and U.S. patent application Ser. No. 17/306,457, filed May 3, 2021, the entire disclosures of which are hereby incorporated by reference herein.
- The present application relates generally to halogenated batteries comprising an anode, a cathode, and an electrolyte. The halogenated batteries can be operated under an atmosphere comprising a greenhouse gas, wherein the battery is fabricated under a greenhouse gas atmosphere, or wherein the greenhouse gas is introduced into the battery before use. The present application also relates to halogenated batteries comprising an aliphatic nitrile compound as part of the electrolyte, an organic material having a conjugated cyclic structure as part of the cathode active material, or a metal oxide as part of the anode active material.
- Batteries are in high demand for a wide range of applications, from small batteries for industrial and medical devices, to larger batteries for electric vehicles and grid energy storage systems. The most well-known and widely used batteries are lithium-ion batteries, which use an intercalated lithium compound as one electrode material and have lithium ions move back and forth between the cathode and anode in the pond of electrolyte. Low cycle life, slow charging rate, poor temperature performance and high materials costs may adversely impact the widespread adoption of such batteries in certain applications. It would therefore be advantageous to provide an improved battery that addresses these and other issues.
- The present application discloses a battery that advantageously exhibits fast charging and long battery life, which may be produced relatively inexpensively by virtue of using a halogenated (e.g., iodized) compound as a cathode active material. The battery may be fabricated in a greenhouse gas atmosphere according to an exemplary embodiment. According to another exemplary embodiment, the gas may be introduced into the battery to displace all or a portion of the gas that may be present within the battery. Advantageously, batteries produced in accordance with the present disclosure exhibit an improvement in cycle life, applicable current, self-discharge rate, specific capacity, operating voltage, and low-temperature performance.
- In one aspect, which may be combined with any other aspect or embodiment, the present disclosure relates to a battery, comprising: a cathode comprising a halogenated compound as a cathode active material; an anode comprising an anode active material; an electrolyte comprising an electrolytic solvent, wherein the electrolytic solvent is between the cathode and the anode and in contact with the cathode and the anode; and an exterior housing enclosing the cathode, the anode, the electrolyte, and a gaseous atmosphere, wherein the gaseous atmosphere comprises a greenhouse gas. In some embodiments, one or both of the cathode and the anode further comprises an electrically-conductive material comprising a porous carbon in contact with the cathode active material. In some embodiments, the porous carbon material is selected from the group consisting of carbon black, carbon nanotubes, carbon nanofibers, carbon dots, activated carbon, graphite, graphene, graphene oxide, reduced graphene oxide, graphene nanoribbons, and combinations thereof. In some embodiments, the porous carbon material is doped with one or more heteroatoms selected from the group consisting of boron, oxygen, nitrogen, sulfur, phosphorous, fluorine, chlorine, bromine, and combinations thereof.
- In some embodiments, the electrolyte comprises an aliphatic nitrile compound. In some embodiments, the battery further comprises an electrolyte additive, wherein the electrolyte additive comprises a heterocyclic compound comprising at least one nitrogen atom in its ring.
- In some embodiments, the cathode further comprises an organic material having a conjugated cyclic structure. In some embodiments, the halogenated compound comprises an organic moiety. In some embodiments, the cathode and/or the electrolyte further comprise(s) a plasticizer. In some embodiments, the cathode and/or the electrolyte further comprise(s) a carboxylic acid.
- In some embodiments, the greenhouse gas comprises carbon dioxide (CO2), carbon monoxide (CO), ozone (O3), methane (CH4), tetrafluoromethane (CF4), hexafluoroethane (C2F6), sulfur hexafluoride (SF6), carbon tetrachloride (CCl4), nitrous oxide (N2O), sulfur dioxide (SO2), carbon disulfide (CS2), and carbonyl sulfide (COS), one or more perfluorocarbons, one or more chlorofluorocarbons, one or more hydrofluorocarbons, or a combination thereof. In some embodiments, the greenhouse gas comprises carbon dioxide. In some embodiments, the greenhouse gas is excluded from an electrochemical reaction during one or more of charging and discharging of the battery.
- In some embodiments, the battery further comprises a cathode current collector, wherein the cathode current collector is in contact with the cathode, and the cathode is between the electrolyte and the cathode current collector. In some embodiments, the cathode current collector comprises a metal alloy having at least one material selected from the group consisting of molybdenum, titanium, zirconium, and combinations thereof.
- In some embodiments, the battery further comprises an anode current collector, wherein the anode current collector is in contact with the anode, and the anode is between the electrolyte and the anode current collector. In some embodiments, the anode current collector comprises a metal alloy having at least one material selected from the group consisting of molybdenum, titanium, zirconium, and combinations thereof.
- In some embodiments, the halogenated compound is soluble in the electrolytic solvent. In some embodiments, the halogenated compound has a solubility of greater than 1 mmol/L in the electrolytic solvent at room temperature. In some embodiments, the halogenated compound has a solubility of greater than 10 mmol/L in the electrolytic solvent at room temperature.
- In one aspect, which may be combined with any other aspect or embodiment, the present disclosure relates to a method for producing a battery, comprising: inserting cell components into an exterior housing in the following order: (1) an anode current collector; (2) an anode; (3) an electrolyte; (4) a cathode; and (5) a cathode current collector, or vice versa, wherein: the electrolyte is between the cathode and the anode; the cathode is between the cathode current collector and the electrolyte; and the anode is between the anode current collector and the electrolyte; compressing the cell components so that the electrolyte is homogeneously in contact with the anode and the cathode; enclosing the cell in the exterior housing under a greenhouse gas-rich atmosphere; charging and/or discharging the battery at least one time; opening the battery to displace forming gas generated during the charge and/or discharge cycle; and closing the cell under the greenhouse gas-rich atmosphere or an inert gas-rich atmosphere.
- In some embodiments, the cathode comprises a halogenated compound.
- In some embodiments, the electrolyte comprises an aliphatic nitrile compound.
- In some embodiments, the charging and/or discharging is conducted at a current density of 0.1 mA/cm2 or less.
- In some embodiments, the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less.
- In one aspect, which may be combined with any other aspect or embodiment, the present disclosure relates to a method for producing a battery, comprising: inserting cell components into an exterior housing in the following order: (1) an anode current collector; (2) an anode; (3) an electrolyte; (4) a cathode; and (5) a cathode current collector, or vice versa, wherein: the electrolyte is between the cathode and the anode; the cathode is between the cathode current collector and the electrolyte; and the anode is between the anode current collector and the electrolyte; compressing the cell components so that the electrolyte is homogeneously in contact with the anode and the cathode; enclosing the cell in the exterior housing under an atmosphere that is not greenhouse gas-rich; purging the cell with a greenhouse gas to create a greenhouse gas-rich atmosphere within the cell; charging and/or discharging the battery at least one time; opening the battery to displace forming gas generated during the charge and/or discharge cycle; and performing one of the following steps: closing the cell under a greenhouse gas-rich atmosphere; closing the cell under an atmosphere that is not greenhouse gas-rich and then purging the cell with a greenhouse gas to create a greenhouse gas-rich atmosphere within the cell; or closing the cell under an inert gas-rich atmosphere.
- In some embodiments, the cathode comprises a halogenated compound as a cathode active material.
- In some embodiments, the electrolyte comprises an aliphatic nitrile compound.
- In some embodiments, the charging and/or discharging is conducted at a current density of 0.1 mA/cm2 or less.
- In some embodiments, the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less.
- In an aspect, which may be combined with any other aspect or embodiment, the present disclosure relates to a battery, comprising: a cathode comprising a halogenated compound as a cathode active material; an electrolyte comprising at least three carbonate compounds; and an exterior housing enclosing the cathode, the electrolyte, and a gaseous atmosphere, wherein the gaseous atmosphere comprises a greenhouse gas. In some embodiments, the greenhouse gas comprises carbon dioxide.
- In another aspect, which may be combined with any other aspect or embodiment, the present disclosure relates to a battery comprising a cathode comprising a halogenated compound, and an electrolyte comprising an electrolyte additive, wherein the electrolyte additive comprises a heterocyclic compound including at least one nitrogen atom in its ring.
- Additional aspects and/or embodiments of the invention will be provided, without limitation, in the detailed description of the present technology set forth below.
- Various objects, aspects, features, and advantages of the disclosure will become more apparent and better understood by referring to the detailed description taken in conjunction with the accompanying drawings, in which like reference characters identify corresponding elements throughout. In the drawings, like reference numbers generally indicate identical, functionally similar, and/or structurally similar elements.
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FIG. 1 is a schematic view of a battery according to an exemplary embodiment. -
FIG. 2 is a schematic view of a battery according to another exemplary embodiment. -
FIG. 3 is a schematic view of a battery according to another exemplary embodiment. -
FIG. 4 is a schematic view of a battery according to another exemplary embodiment. -
FIG. 5 is a schematic view of an apparatus for dissolving a greenhouse gas in a liquid electrolyte. -
FIG. 6 is a flow chart of a method of fabricating a battery according to an exemplary embodiment. -
FIG. 7 is a flow chart of a method of fabricating a battery according to another exemplary embodiment. -
FIG. 8 is a flow chart of a method of fabricating a battery according to another exemplary embodiment. -
FIG. 9 is a flow chart of a method of fabricating a battery according to another exemplary embodiment. -
FIG. 10 is a plot showing the high-rate capability of a battery comprising a halogenated compound as a cathode active material, a metal oxide as an anode active material, an aliphatic nitrile compound as an electrolyte, a plasticizer, a carboxylic acid and carbon dioxide. -
FIG. 11 is a plot showing low temperature performance of a battery comprising a halogenated compound as a cathode active material, a metal oxide as an anode active material, a nitrile and a heterocyclic compound with a nitrogen atom in its ring as an electrolyte, a plasticizer, a carboxylic acid, and carbon dioxide. -
FIG. 12 is a plot showing specific capacity at low operating temperature for a battery comprising a halogenated compound as cathode active material, lithium metal as anode, an aliphatic nitrile compound (LiTFSI-MAN) as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring (5% MIB) as an electrolyte additive, succinonitrile as a plasticizer, a carboxylic acid, and carbon dioxide internal atmosphere, versus that observed for a convention battery using a LiPF6-based electrolyte and NMC111 cathode. -
FIG. 13 is a plot showing the specific capacity of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the electrolyte additive. -
FIG. 14 is a plot showing the average operating voltage of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the electrolyte additive. -
FIG. 15 is a plot showing the electrochemical utilization of the active materials of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, at different sweeping rates. -
FIG. 16 is a plot showing specific capacity of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid and carbon dioxide, as a function of the carbon dioxide pressure in the experimental setup used to dissolve the carbon dioxide in the electrolyte. -
FIG. 17 is a plot showing the specific capacity of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the carbon dioxide pressure in the cell atmosphere. -
FIG. 18 is a plot showing self-discharge rate of a battery comprising a halogenated compound as a cathode active material, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the carbon dioxide pressure in the cell atmosphere. -
FIG. 19 is a plot showing the specific capacity and the coulombic efficiency of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the plasticizer concentration. -
FIG. 20 is a plot the self-discharge rate of a battery comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide, as a function of the plasticizer concentration. -
FIG. 21 is a plot showing the superior cycle life (at 0° C. operating temperature) of a battery comprising a halogenated compound as a cathode active material, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a plasticizer, a carboxylic acid, and carbon dioxide. - The present application relates to batteries and methods of producing such batteries that address various issues affecting with existing batteries. The batteries described according to the various exemplary (and non-limiting) examples herein provide several advantages. For example, the batteries will have higher energy density, higher power density, longer cycle life, and/or the batteries will exhibit enhanced low temperature performance, when compared to existing batteries.
- Reference will now be made in detail to some specific embodiments contemplated by the present disclosure. While various embodiments are described herein, it will be understood that it is not intended to limit the present technology to the described embodiments. On the contrary, it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the technology as defined by the appended claims.
- In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present technology. Particular exemplary embodiments of the present technology may be implemented without some or all of these specific details. In other instances, well known process operations have not been described in detail in order not to unnecessarily obscure the present technologies.
- Various techniques and mechanisms of the present technology will sometimes be described in singular form for clarity. However, it should be noted that some embodiments include multiple iterations of a technique or multiple instantiations of a mechanism unless noted otherwise.
- Definitions
- As used herein, the term “anode” refers to the negative electrode of a battery cell that transfers electrons to an external circuit through oxidation during discharging, and receives them from an external circuit and is reduced during charging.
- As used herein, the term “cathode” refers to the positive electrode of a battery cell that receives electrons from an external circuit and is reduced during discharging, and transfers them to an external circuit through oxidation during charging. In the batteries discussed herein with respect to the various exemplary embodiments, the cathode material includes a halogenated compound and/or an electroactive organic material as defined above.
- As used herein, the term “current collector” is used to refer to the component adjacent to the positive and the negative electrode for conveying current from a fixed to a moving portion of the circuit of the battery or vice versa
- As used herein, the term “electrolyte” refers to a material that provides for ion transport of a battery cell. An electrolyte acts as a conduit for ion transport through its interaction with the anode and the cathode. Upon battery charging, an electrolyte facilitates the movement of ions from the cathode to the anode, whereas upon discharge, the electrolyte facilitates the movement of ions from the anode to the cathode. In rechargeable batteries, the electrolyte promotes ion cycling between the anode and the cathode.
- As used herein, the term “full lifecycle of the battery” is intended to mean that the life of the battery is considered to have exceeded its normal useful life, which is assumed here to be the point at which the battery shows 80% of its original capacity for the first time.
- As used herein, the term “greenhouse gas” refers to a gas that absorbs and emits radiant energy within the thermal infrared range. A greenhouse gas causes the greenhouse effect, the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere. Some non-exclusive examples include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), ozone (O3), tetrafluoromethane (CF4), hexafluoroethane (C2F6), sulfur hexafluoride (SF6), carbon tetrachloride (CCl4), sulfur hexafluoride (SF6), nitrogen trifluoride (NF3), hydrofluorocarbons, chlorofluorocarbons, perfluorocarbons although there are many additional possibilities, some of which are discussed below.
- As used herein, the term “halogenated compound” refers to a compound comprising at least one halogen and at least one metal or at least one oxygen atom. Some non-exclusive examples include ClO2, LiCl, and LiClO3 although there are many additional possibilities, some of which are discussed below.
- As used herein, the term “heterocyclic compound” refers to a cyclic compound that has atoms of at least two different elements as members of its ring.
- As used herein, the term “aliphatic nitrile compound” refers to an open-chain compound comprising at least one nitrile functional group. The aliphatic nitrile compound can be straight or branched, and contain no rings of any type.
- As used herein, the term “plasticizer” refers to a material that is added to an organic material to make it softer and more flexible, to increase its plasticity.
- As used herein, the term “standard atmospheric pressure” is intended to mean a unit of pressure defined as 101,325 Pa, which is equivalent to 760 mm Hg, 29.9212 inches Hg, 14.696 psi, or 1.013 bar.
- Cathode Active Material
- Batteries according to the present disclosure comprise a cathode active material. The cathode active material refers to the portion or component of a cathode that participates in electrochemical reactions (e.g., reduction, oxidation) by transporting ions through an electrolyte and/or electrons through an external circuit. The cathode active material may constitute the entirety of the cathode, but is typically only a component of, or a coating on, the cathode. In some embodiments, the cathode active material comprises a sulfide (e.g., metal titanium disulfide, metal polysulfide, M2S, M2S2, M2S4, M2S6, M2S2, MV0.5Ti0.5S2, where M is a metal), a sulfur containing material (e.g., sulfate, organosulfur), an oxide (e.g., a material of the form MxTi5O12, TiO2, TiNb2O7, Nb2O5, MxVO4, H2Ti6O13, MxMnBO3, MxV2O5, MxMoO4, MxW2O7, M′1−xM″O2, M′1−w(M″xM′″y)O2, M1−w(MnxNiyCoz)O2, M1−w(MnxNiyCozAlw)O2, M1−w(NixCoyAlz)O2, M′1−w(NixCoyM″z)O2, M′1−w(NixMnyM″z)O2, M′M″M′″2O4, MxVyOz, M′M″PO4, M′M″xM′″1−xPO4, where M′, M″, and M′″ may be different metals, metal titanates, metal iron phosphates, metal nickel manganese cobalt oxides, metal nickel cobalt aluminum oxides, metal cobalt oxides, metal nickel oxides, and metal manganese oxides, among others), a halogenated compound, or any combination thereof. In some embodiments, the cathode comprises one or more of an organic material having a conjugated cyclic structure and an electroactive organic material (e.g., truxenone, truxenone derivatives, phenoxazine, phenoxazine derivatives, phenothiazine, phenothiazine, derivatives (e.g., 10-acetylphenothiazine, 10-[2(2-methoxyethoxy)ethyl]-10H-phenothiazine), quinone, quinone derivatives (e.g., 2,2′-(2-vinylanthracene-9,10-diylidene)dimalononitrile, 2-vinylanthraquinone, anthraquinone-2,6-disulfonate, anthraquinone-1,8-disulfonate, anthraquinone-1-sulfonate, anthraquinone-1,5-disulfonic acid, 2,2′-(2-vinylanthracene-9,10-diylidene)bis(1,3-dithiole)), diamine derivatives, phenazine, phenazine derivatives, quinoxaline, quinoxaline derivatives, pyrazine, pyrazine derivatives, cyclohexane, cyclohexane derivatives, triazine, triazine derivatives, melamine, melamine derivatives, dimethoxybenzene, di methoxybenzene derivatives, cyclopropenium derivatives, amide derivatives, amino acid, amino acid derivatives, viologen, viologen derivatives (e.g., ethylviologen), nitroxide derivatives), an organic radical (e.g., piperidine derivatives (e.g., 4-isothiocyanato-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-oxo-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-(2-iodoacetamido)-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-amino-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine 1-oxyl, 2,2,6,6-tetramethylpiperidine 1-oxyl, 4-acetamido-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-amino-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-(2-chloroacetamido)-2,2,6,6-tetramethylpiperidine 1-oxyl, 2,2,6,6-tetramethyl-4-(2-propynyloxy)piperidine 1-oxyl, 2,2,6,6-tetramethylpiperidine 1-oxyl, 4-carboxy-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-glycidyloxy-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-cyano-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-oxo-2,2,6,6-tetramethylpiperidine 1-oxyl, bis(2,2,6,6-tetramethyl-4-piperidyl-1-oxyl) sebacate, 4-methoxy-2,2,6,6-tetramethylpiperidine 1-oxyl), pyrrolidine derivatives (e.g., 3-carboxy-2,2,5,5-tetramethylpyrrolidine 1-oxyl, 16-DOXYL-stearic acid), imidazoline derivatives (e.g., 2-phenyl-4,4,5,5-tetramethylimidazoline-3-oxide-1-oxyl, 2-(4-nitrophenyl)-4,4,5,5-tetramethylimidazoline-3-oxide-1-oxyl), 1,1-diphenyl-2-picrylhydrazyl, galvinoxyl), and any combination thereof). As used herein, the term “conjugated cyclic structure” is intended to mean a chemical structure of connected p orbitals with delocalized electrons in a molecule in which one or more series of atoms is connected to form a ring.
- In some embodiments, the cathode active material comprises a halogenated compound. In some embodiments, the halogenated compound comprises one or more halogen atoms (e.g., F, Cl, Br, or I). In some embodiments the halogenated compound comprises one or more metal atoms (e.g., alkaline earth metal, transition metal, rare earth metal, post-transition metal, alkali metal, amphoteric metal or any combination thereof). In some embodiments, the halogenated compound has a chemical formula of MaCbHcOdAx, wherein M is a metal, C is a carbon atom, H is a hydrogen atom, O is an oxygen atom, A is a halogen atom, a, b, c, and d are independently non-negative real numbers, and x is a positive nonzero real number. In some embodiments, the halogenated compound has a chemical formula of MxCaHbOcAy, wherein M is a metal, C is a carbon atom, H is a hydrogen atom, O is an oxygen atom, A is a halogen atom, a, b, and c are independently non-negative real numbers, and x and y are independently positive nonzero real numbers. In some embodiments, the halogenated compound has a chemical formula of MaCbHcOxAy, wherein M is a metal, C is a carbon atom, H is a hydrogen atom, O is an oxygen atom, A is a halogen atom, a, b, and c are independently non-negative real numbers, and x and y are independently positive nonzero real numbers. In some embodiments, the halogenated compound has a chemical formula of MxM′aPbCcHdOeAy, wherein M is a metal, M′ is another metal, P is a phosphorous atom, C is a carbon atom, H is a hydrogen atom, O is an oxygen atom, A is a halogen atom, a, b, c, d, and e are independently non-negative real numbers, and x and y are independently positive nonzero real numbers. In some embodiments, the halogenated compound has a chemical formula of MxAy, wherein M is a metal, A is a halogen atom, and x and y are independently positive nonzero real numbers. In some embodiments, the metal comprises atoms of one or more of lithium, sodium, potassium, beryllium, magnesium, calcium, vanadium, iron, nickel, copper, zinc, and aluminum, and ions thereof. In some embodiments, the halogenated compound comprises, by way of non-limiting example, LiCl, LiClO, LiClO3, LiClO4, Li3ClO, Li17Cl5O6, LiClO2, Li5Cl3O, LiCl2O4, LiClO7, LiBr, Li3BrO, Li7Br3O2, Li2BrO, Li5Br3O2, LiBrO3, LiBrO, LiI, LiI03, Li5IO6, LiIO4, Li2IO6, LiIO5, LiF, LiC4OF9, LiH8C4O5F9, Li2H10C8O7F18, LiH20C8ClO4, LiH20C8BrO4, LiH2ClO5, Li4H3ClO3, LiH6ClO7, LiH2ClO, LiH6BrO7, LiH2BrO, Li4H3BrO3, LiH2BrO5, LiH2IO, Li2 1HIO, LiH2IO, LiH6IO7, C4O5F6, C2O3F2, C2O3F6, C68OF20, C3OF2, ClO2, Cl2O7, ClO3, Cl2O, ClO, Cl2O4, Cl2O6, ClO6, ClO5, CCl2O, C6Cl4O2, C8C14O3, C20C118O, C3C12O, H5C2ClO, C9H11Cl7, BrCl, Br2O3, Br2O, BrO3, BrO4, BrO2, BrO, C3Br2O, I2O5, IO2, IO3, I3O8, C2IO, CuF2, LiNiaCobMncAldO2-xClx, LiNiaCobMncAldO2-xFx, LiNiaCobMncAldO4-xClx, LiNiaCobMncAldO4-xFx, LiCoOxFy, LiCoOxCly, LiFePO4-xFx, LiFePO4-xClx, or any combination thereof, where a, b, c, and d are independently non-negative real numbers, and x and y are independently positive nonzero real numbers. In some embodiments, the halogenated compound has one or more of organic moieties, where an organic moiety comprises one or more of carbon and hydrogen and is a fragment or substituent of a larger material. In some embodiments, the organic moiety is derived from an appropriate organic material or organic compound. In some embodiments, the organic moieties comprise, by way of non-limiting examples, alkyl groups, alkenyl groups, alkynyl groups, acyl groups, alkylamino groups, aryl groups, aromatic groups or any combinations thereof. In some embodiments, the organic moiety comprises a heteroatom, such as boron, oxygen, nitrogen, sulfur, phosphorous, fluorine, chlorine, bromine, nitrogen, oxygen, or any combinations thereof. In some embodiments, the halogenated compound comprises an organic moiety that includes one or more aromatic groups. As used herein, the term “aromatic group” is intended to mean a functional group that contain one or more rings with pi electrons delocalized all the way around them.
- Cathode Current Collector
- In some embodiments, a battery according to the present disclosure comprises a cathode current collector. In some embodiments, the cathode current collector comprises one or more metals (e.g., alkaline earth metal, transition metal, rare earth metal, post-transition metal, alkali metal, or any combination thereof). In some embodiments, the cathode current collector comprises at least one of aluminum, a form of aluminum, aluminum alloy, nickel, a form of nickel, nickel alloy, duplex steel, stainless steel or any combination thereof. In some embodiments, the cathode current collector comprises a metal alloy having at least one material selected from the group consisting of molybdenum, titanium, zirconium, and combinations thereof.
- In some embodiments, the cathode current collector is in contact with (e.g., coated with) a halogenated compound and/or an electrically-conductive material. In some embodiments, the electrically conductive material as part of the cathode is a porous carbon material comprising, consisting essentially of, or is selected from the group consisting of carbon black, carbon nanotubes, carbon nanofibers, carbon dots, activated carbon, amorphous carbon, microporous carbon, mesoporous carbon, macroporous carbon, graphite, graphene, graphene oxide, reduced graphene oxide, graphene nanoribbons, and combinations thereof. In some embodiments, the porous carbon material is doped with one or more heteroatoms selected from the group consisting of boron, oxygen, nitrogen, sulfur, phosphorous, fluorine, chlorine, bromine, and combinations thereof. In some embodiments, the electrically-conductive material is in the form of particles, powders, paper, foam, fibers, sheets, discs, rods, foils, or any combination thereof.
- In some embodiments, the electrically conductive material comprises a porous carbon material. In some embodiments, the porous carbon material comprises particles with an average particle size (diameter) of 50 nm to 50 μm, though the particle size is not particularly limited. In some embodiments, the average particle size is at least 50 nm, at least 55 nm, at least 60 nm, at least 65 nm, at least 70 nm, at least 75 nm, at least 80 nm, at least 85 nm, at least 90 nm, at least 95 nm, at least 100 nm, at least 110 nm, at least 120 nm, at least 130 nm, at least 140 nm, at least 150 nm, at least 200 nm, at least 250 nm, at least 300 nm, at least 350 nm, at least 400 nm, at least 450 nm, at least 500 nm, at least 550 nm, at least 600 nm, at least 650 nm, at least 700 nm, at least 750 nm, at least 800 nm, at least 850 nm, at least 900 nm, at least 950 nm, at least 1 μm, at least 2 μm, at least 3 μm, at least 4 μm, at least 5 μm, at least 10 μm, at least 20 μm, at least 30 μm, at least 40 μm, at least 50 μm, or any range or value therein.
- In some embodiments, the porous carbon material comprises particles with an average particle size (diameter) no greater than 50 μm, no greater than 40 μm, no greater than 30 μm, no greater than 20 μm, no greater than 10 μm, no greater than 5 μm, no greater than 4 μm, no greater than 3 μm, no greater than 2 μm, no greater than 1 μm, no greater than 950 nm, no greater than 900 nm, no greater than 850 nm, no greater than 800 nm, no greater than 750 nm, no greater than 700 nm, no greater than 650 nm, no greater than 600 nm, no greater than 550 nm, no greater than 500 nm, no greater than 450 nm, no greater than 400 nm, no greater than 350 nm, no greater than 300 nm, no greater than 250 nm, no greater than 200 nm, no greater than 150 nm, no greater than 100 nm, no greater than 95 nm, no greater than 90 nm, no greater than 85 nm, no greater than 80 nm, no greater than 75 nm, no greater than 70 nm, no greater than 65 nm, no greater than 60 nm, no greater than 55 nm, no greater than 50 nm, or any range or value therein.
- The pore size of the porous carbon material is not particularly limited. In some embodiments, the porous carbon material may have a pore size of 0.1 nm to 1 μm. In some embodiments, the pore size is at least 0.1 nm, at least 0.2 nm, at least 0.3 nm, at least 0.4 nm, at least 0.5 nm, at least 0.6 nm, at least 0.7 nm, at least 0.8 nm, at least 0.9 nm, at least 1 nm, at least 2 nm, at least 3 nm, at least 4 nm, at least 5 nm, at least 6 nm, at least 7 nm, at least 8 nm, at least 9 nm, at least 10 nm, at least 20 nm, at least 30 nm, at least 40 nm, at least 50 nm, at least 60 nm, at least 70 nm, at least 80 nm, at least 90 nm, at least 100 nm, at least 150 nm, at least 200 nm, at least 250 nm, at least 300 nm, at least 350 nm, at least 400 nm, at least 450 nm, at least 500 nm, at least 550 nm, at least 600 nm, at least 650 nm, at least 700 nm, at least 750 nm, at least 800 nm, at least 850 nm, at least 900 nm, or at least 950 nm, at least 1 μm, at least 2 μm, at least 3 μm, at least 4 μm, at least 5 μm, at least 6 μm, at least 7 μm, at least 8 μm, at least 9 μm, at least 10 μm, or any range or value therein.
- In some embodiments, the pore size is no greater than 10 μm, no greater than 9 μm, no greater than 8 μm, no greater than 7 μm, no greater than 6 μm, no greater than 5 μm, no greater than 4 μm, no greater than 3 μm, no greater than 2 μm, no greater than 1 μm, no greater than 950 nm, no greater than 900 nm, no greater than 850 nm, no greater than 800 nm, no greater than 750 nm, no greater than 700 nm, no greater than 650 nm, no greater than 600 nm, no greater than 550 nm, no greater than 500 nm, no greater than 450 nm, no greater than 400 nm, no greater than 300 nm, no greater than 250 nm, no greater than 200 nm, no greater than 150 nm, no greater than 100 nm, no greater than 90 nm, no greater than 80 nm, no greater than 70 nm, no greater than 60 nm, no greater than 50 nm, no greater than 40 nm, no greater than 30 nm, no greater than 20 nm, no greater than 10 nm, no greater than 9 nm, no greater than 8 nm, no greater than 7 nm, no greater than 6 nm, no greater than 5 nm, no greater than 4 nm, no greater than 3 nm, no greater than 2 nm, no greater than 1 nm, no greater than 0.9 nm, no greater than 0.8 nm, no greater than 0.7 nm, no greater than 0.6 nm, no greater than 0.5 nm, no greater than 0.4 nm, no greater than 0.3 nm, no greater than 0.2 nm, or any range or value therein.
- In some embodiments, the current collector is perforated, wherein the pore size is not particularly limited. In some embodiments, the pore size is at least 500 nm, at least 550 nm, at least 600 nm, at least 650 nm, at least 700 nm, at least 750 nm, at least 800 nm, at least 850 nm, at least 900 nm, at least 950 nm, at least 1 μm, at least 2 μm, at least 3 μm, at least 4 μm, at least 5 μm, at least 10 μm, at least 20 μm, at least 30 μm, at least 40 μm, at least 50 μm, at least 60 μm, at least 70 μm, at least 80 μm, at least 90 μm, at least 100 μm, at least 150 μm, at least 200 μm, at least 250 μm, at least 300 μm, at least 350 μm, at least 400 μm, at least 450 μm, at least 500 μm, at least 550 μm, at least 600 μm, at least 650 μm, at least 700 μm, at least 750 μm, at least 800 μm, at least 850 μm, at least 900 μm, at least 950 μm, at least 1 mm, or any range or value therein.
- The distance between pores is not particularly limited. In some embodiments the distance between pores is at least 10 μm, at least 15 μm, at least 20 μm, at least 25 μm, at least 30 μm, at least 35 μm, at least 40 μm, at least 45 μm, at least 50 μm, at least 55 μm, at least 60 μm, at least 65 μm, at least 70 μm, at least 75 μm, at least 80 μm, at least 85 μm, at least 90 μm, at least 95 μm, at least 100 μm, at least 150 μm, at least 200 μm, at least 250 μm, at least 300 μm, at least 350 μm, at least 400 μm, at least 450 μm, at least 500 μm, at least 550 μm, at least 600 μm, at least 650 μm, at least 700 μm, at least 750 μm, at least 800 μm, at least 850 μm, at least 900 μm, at least 950 μm, at least 1 mm, at least 2 mm, at least 3 mm, at least 4 mm, at least 5 mm, at least 6 mm, at least 7 mm, at least 8 mm, at least 9 mm, at least 10 mm, at least 15 mm, at least 20 mm, at least 25 mm, at least 30 mm, at least 35 mm, at least 40 mm, at least 45 mm, at least 50 mm, at least 55 mm, at least 60 mm, at least 65 mm, at least 70 mm, at least 75 mm, at least 80 mm, at least 85 mm, at least 90 mm, at least 95 mm, at least 100 mm, or any range or value therein.
- Electrolyte
- In some embodiments, a battery according to the present disclosure comprises an electrolyte. In some embodiments, the electrolyte comprises an electrolytic solvent, wherein the electrolytic solvent is between the cathode and the anode and in contact with the cathode and the anode. In some embodiments, the electrolyte comprises a solid electrolyte (e.g., polymers, glass, phosphates, fluorophosphates, carbonates, amines, borates, fluoroborates, halides, halates, oxohalides, oxides (e.g., MO2, M2O3, M2B2O5, M2O, MOH, M2O2, M2CO3, P2O5, MPO4, M2M′3O7, wherein M is a metal or metalloid), perovskites, antiperovskites (e.g., M3OBr, M0OCl, M2OHBr, M2OHCl, wherein M is a metal or metalloid), LISICON-type electrolytes (e.g., M1+xM′xM″2−x(PO4)3, M2+2xM′1−xM″O4, M(3+x)M′xV(1−x)O4, M(4−x)M′(1−xPxO4, M1+x+yM′xM′2−xSiyP3−yO12, M1+xM′xM″yTi2−x−yP3O12,M1+x+3yM′xM″2−x(SiyPO4)3, M14M′M″4O16, M4−xM′xVxO4, wherein M is metal or metalloid), garnets (e.g., M7M′3M″2O12, M7−xM′3M″2−xNbxO12, M7M′3−xM″xZr2−xNbxO12, M6+xM′3M″1+xTa1−xO12, wherein M is a metal or metalloid), sulfides (e.g., M6PS5Cl, M9.54M′1.74P1.44S11.7Cl0.3, M10M′P2S12, M7PS6, M7P3S11, M3.25P0.95S4, M3+xM′xP1−xS4, wherein M is a metal or metalloid), thio-LISICON type electrolytes (e.g., M(4−x)M′(1−x)PxS4, wherein M is a metal or metalloid), oxynitrides, nitrides, or the like), liquid electrolyte, a liquefied gas electrolyte (e.g., methane (e.g., methane, fluoromethane, difluoromethane), an ethane (e.g., ethane, fluoroethane, 1,1-difluoroethane, 1,1,1,2-tetrafluoroethane), a propane (e.g., propane, 2-fluoropropane), a butane (e.g., butane, fluorobutane), an ethylene, an acetylene, a propylene), or any combination thereof. In some embodiments, the electrolyte comprises an aqueous electrolyte. In some embodiments, the electrolyte comprises at least one aliphatic nitrile compound. In some embodiments, the aliphatic nitrile compound comprises, by way of non-limiting example, 3-methoxypropionitrile (MPN), methoxyacetonitrile (MAN), acetonitrile (AN), valeronitrile (VN), succinonitrile, glutaronitrile, adiponitrile, acrylonitrile, propionitrile, tolunitrile, methoxybenzonitrile, malononitrile, tetracyanoethylene, 3,3′-oxydipropionitrile, 3-ethoxypropionitrile, 1,3,6-hexanetricarbonitrile, 1,2,2,3-propanetetracarbonitrile, malononitrile, fumaronitrile, or 3-butoxypropionitrile or any combination thereof.
- In some embodiments, the electrolyte comprises a heterocyclic compound with at least one nitrogen atom in its ring. In some embodiments, the electrolyte comprises pyridine, imidazole, 1,2,3,6-tetrahydropyridine, piperidine, methylpyridine, aminopyridine, ethynylpyridine, vinylpyridine, dimethylpyridine, ethylpyridine, lutidine, 4-tert-butylpyridine (TBP), 2,2′-bipyridine (BPY), 1-methylimidazole (MI), 1-methylbenzimidazole (MIB), 1-(trimethylsilyl) imidazole), methylimidazoline, vinylimidazole, dimethylimidazole, mercaptoimidazole, histamine, nitroimidazole, ethylpiperazine, methimazole, thiamazole, 2-mercapto-1-methylimidazole, dicyanoimidazole, or any combination thereof.
- In some embodiments, the electrolyte comprises at least one, preferably at least two, or more preferably at least three carbonate compounds. In some embodiments, the carbonate compounds comprise ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), propylene carbonate (PC), dipropyl carbonate (DPC), fluoroethylene carbonate (FEC), vinylene carbonate, 4-vinyl-1,3-dioxolan-2-one, 4-chloro-1,3-dioxolan-2-one,
diethyl 2,5-dioxahexanedioate, bis(2,2,2-trifluoroethyl) carbonate, 4-fluoro-1,3-dioxolan-2-one,dimethyl 2,5-dioxahexanedioate, dibutyl carbonate, among others or any combination thereof. In some embodiments, the electrolyte comprises at least one ether compound. In some embodiments, the ether compounds comprise, by way of non-limiting example, dime thoxyethane, dimethoxymethane, dimethyl ether, diethyl ether, ethylene glycol, ethylene glycol derivatives (diglyme, triglyme, tetraglyme), tetrahydrofuran, dioxolane, dioxane, or any combinations thereof. In some embodiments, the electrolyte comprises at least one amide compound. In some embodiments, the amide compounds comprise, by way of non-limiting example, dimethylformamide, dimethylacetamide, dipropylacetamide, among others, or any combinations thereof. In some embodiments, the electrolyte comprises at least one ester compound. In some embodiments, the ester compounds comprise, by way of non-limiting example, triethyl borate, trimethyl borate, tris(2,2,2-trifluoroethyl) borate, 2,4,6-trimethoxyboroxin, tributyl borate, trihexyl borate, tripropyl borate, or any combinations thereof. In some embodiments, the electrolyte comprises at least one ionic liquid. In some embodiments, the ionic liquids comprise, by way of non-limiting example, an imidazolium derivative (such as, for example, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-2,3-dimethylimidazolium bis(trifluoro-methanesulfonyl)imide, 1-ethyl-3-methylimidazolium bis(trifluoro-methanesulfonyl)imide, 2,3-dimethyl-1-propylimidazolium bis(trifluoro-methanesulfonyl)imide, 1-decyl-3-methyl-imidazolium tetrafluoroborate, 1-decyl-3-methylimidazolium bis(trifluoro-methanesulfonyl)imide, 1,3-dimethylimidazolium bis(trifluoromethanesulfonyl)imide, 1-dodecyl-3-methylimidazolium bis(trifluoro-methanesulfonyl)imide, 1-ethyl-3-methyl-imidazolium nitrate, 1-ethyl-3-methyl-imidazolium trifluoromethanesulfonate, 1-vinylimidazole bis(trifluoro-methanesulfonyl)imide, 1-allyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, 1-methyl-3-n-octylimidazolium trifluoro-methanesulfonate, 3-ethyl-1-vinylimidazolium bis(trifluoromethanesulfonyl)imide, 1-methyl-3-n-octylimidazolium tetrafluoroborate, 1-butyl-2,3-dimethylimidazolium tetrafluoro-borate, 1-butyl-2,3-dimethylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium methanesulfonate, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, 1-butyl-3-methyl-imidazolium hexafluorophosphate, 1-butyl-2,3-dimethylimidazolium trifluoro-methanesulfonate, 1-ethyl-3-methylimidazolium methane-sulfonate, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, 1-butyl-2,3-dimethyl-imidazolium bis(trifluoromethanesulfonyl)imide, 1-methyl-3-(4-sulfobutyl)imidazolium bis(tri-fluoromethanesulfonyl)imide, 1-methylimidazole bis(trifluoromethanesulfonyl)imide, 1-methyl-1H-imidazol-3-ium hexafluorophosphate, 3,3′-(butane-1,4-diyl)bis(1-vinyl-3-imidazolium) bis(trifluoromethanesulfonyl)imide), a pyrrolidinium derivative, (such as, for example, 1-butyl-1-methylpyrrolidinium trifluoromethanesulfonate, 1-butyl-1-methylpyrrolidinium hexafluorophosphate, 1-methyl-1-pentylpyrrolidinium bis(trifluoromethanesulfonyl)imide, 1-methyl-1-propylpyrrolidinium, bis(trifluoromethanesulfonyl)imide, 1-butyl-1-methylpyrrolidinium bis(trifluoro-methanesulfonyl) imide, 1-ethyl-1-methylpyrrolidinium tetrafluoroborate, or 1-allyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide, among others), a pyridinium derivative (such as, for example, 1-butyl-4-methylpyridinium hexafluorophosphate, 1-butyl-4-methylpyridinium bis(trifluoro-methanesulfonyl)imide, 1-hexylpyridinium hexafluorophosphate, 1-ethyl-3-(hydroxymethyl)pyridinium ethyl sulfate, 1-butylpyridinium tetrafluoroborate, 1-butylpyridinium hexafluorophosphate, 1-butyl-4-methylpyridinium hexafluorophosphate, 1-butylpyridinium tetrafluoroborate, 1-butylpyridinium hexafluorophosphate, 1-butyl-4-methylpyridinium tetrafluoroborate, 1-ethyl-3-methylpyridinium bis(trifluoro-methanesulfonyl)imide, 1-ethyl-3-methylpyridinium ethyl sulfate, 1-methylpyridinium bis(trifluoromethanesulfonyl)imide, or 1,1′-bis[3-(trimethylammonio)propyl]-4,4′-bipyridinium, among others), a piperidinium derivative such as, for example, 1-butyl-1-methylpiperidinium bis(trifluoromethanesulfonyl)imide, or 1-methyl-1-propylpiperidinium bis(fluorosulfonyl)-imide, an ammonium derivative such as, for example, methyltri-n-octylammonium bis(trifluoromethane sulfonyl)imide, ethyl(3-methoxypropyl)dimethylammonium bi s(trifluoro-methanesulfonyl)imide, ethyl(2-methoxyethyl)dimethylammonium bis(trifluoromethane-sulfonyl)imide, butyltrimethyl ammonium bis(trifluoromethan-esulfonyl)imide, tetrabutyl-ammonium trifluoromethanesulfonate, methyltri-n-octylammonium bis(trifluoro-methane-sulfonyl)imide, trimethyl-propylammonium bis(trifluoromethanesulfonyl)imide, tributyl-methylammonium bis(trifluoromethane sulfonyl)imide, butyltrimethylammonium bis(trifluoro-methanesulfonyl)imide, or tetrabutyl ammonium hexafluorophosphate, a phosphonium derivative such as, for example tributylmethylphosphonium bis(trifluoromethanesulfonyl)imide, tributyl(2-methoxyethyl)-phosphonium bis(trifluoro-methane-sulfonyl)imide, tetrabutylphosphonium tetrafluoroborate, tetrabutyl-phosphonium hexafluorophosphate, or tributylmethyl-phosphonium bis(trifluoromethane-sulfonyl)imide, a morpholinium derivative, or a sulfonium derivative (such as, for example, triethylsulfonium bis(trifluoromethanesulfonyl)imide)) or any combinations thereof. - In some embodiments, the electrolytic solvent is in contact with the cathode active material. In some embodiments, the electrolytic solvent is in contact with the cathode active material, and is located in the cathode (e.g., in between particles constituting the cathode active material). In some embodiments, the halogenated compound is soluble in the electrolytic solvent. In some embodiments, the halogenated compound has a solubility of greater than 1 mmol/L in the electrolytic solvent at room temperature. Preferably, the halogenated compound has a solubility of greater than 10 mmol/L in the electrolytic solvent at room temperature. More preferably, the halogenated compound has a solubility of greater than 100 mmol/L in the electrolytic solvent at room temperature.
- Electrolyte Additive
- In some embodiments, a battery according to the present disclosure includes an electrolyte additive. In some embodiments, the electrolyte additive comprises phosphazenes, phosphates, sulfonyls, carboxylic acids, or any combinations thereof. In some embodiments, the electrolyte additive comprises a heterocyclic compound with a nitrogen atom in its ring. In some embodiments, the electrolyte comprises, by way of non-limiting example, pyridine, imidazole, 1,2,3,6-tetrahydropyridine, piperidine, methylpyridine, aminopyridine, ethynylpyridine, vinylpyridine, dimethylpyridine, ethylpyridine, lutidine, 4-tert-butylpyridine (TBP), 2,2′-bipyridine (BPY), 1-methylimidazole (MI), 1-methylbenzimidazole (MIB), 1-(trimethylsilyl) imidazole), methylimidazoline, vinylimidazole, dimethylimidazole, mercaptoimidazole, histamine, nitroimidazole, ethylpiperazine, methimazole, thiamazole, 2-mercapto-1-methylimidazole, dicyanoimidazole, or any combination thereof.
- Anode
- In some embodiments, a battery according to the present disclosure comprises an anode comprising an anode active material. The anode active material refers to the portion or component of an anode that participates in electrochemical reactions (e.g., reduction, oxidation) by transporting ions through an electrolyte and/or electrons through an external circuit. The anode active material may constitute the entirety of the anode, but is typically only a component of, or a coating on, the anode. The selection of anode active material is not particularly restricted provided that the selected material can store and release ions. For example, the anode active material can be an alkali metal (such as lithium, sodium, and/or potassium), an alkaline earth metal (such as, magnesium and/or calcium), an amphoteric metal (such as aluminum and/or zinc), a metalloid (such as boron, germanium, arsenic, antimony, tin, tellurium, polonium, and/or silicon), a metal complex, an inorganic carbon (such as graphite, graphene, graphene oxide, reduced graphene oxide, activated carbon, carbon nanotubes, and/or carbon dots), sulfur, a sulfide (such a metal titanium disulfide MV0.5Ti0.5S2, where M is a metal, metal sulfide (M2S), metal polysulfide (e.g., M2S2, M2S4, M2S6, M2S8)), a sulfur-containing compound or material (such as a sulfate or organosulfur compound (e.g., poly(sulfur-random-(1,3-diisopropenylbenzene)), sulfurized polyacrylonitrile)), an oxide (e.g., a material of the form MxTi5O12, TiO2, TiNb2O7, Nb2O5, MxVO4, H2Ti6O13, MxMnBO3, MxV2O5, MxMoO4, MxW2O7, M′1−xM″O2, M′1−w(M″xM′″y)O2, and/or metal titanate), an organic material or compound (e.g., truxenone, truxenone derivatives, phenoxazine, phenoxazine derivatives, phenothiazine, phenothiazine derivatives (e.g., 10-acetylphenothiazine, 10-[2-(2-methoxyethoxy)ethyl]-10H-phenothiazine), quinone, quinone derivatives (e.g., 2,2′-(2-vinylanthracene-9,10-diylidene)dimalononitrile, 2-vinylanthraquinone, anthraquinone-2,6-disulfonate, anthraquinone-1,8-disulfonate, anthraquinone-1-sulfonate, anthraquinone-1,5-disulfonic acid, 2,2′-(2-vinylanthracene-9,10-diylidene)bis(1,3-dithiole)), diamine derivatives, phenazine, phenazine derivatives, quinoxaline, quinoxaline derivatives, pyrazine, pyrazine derivatives, cyclohexane, cyclohexane derivatives, triazine, triazine derivatives, melamine, melamine derivatives, dimethoxybenzene, dimethoxybenzene derivatives, cyclopropenium derivatives, amide derivatives, amino acid, amino acid derivatives, viologen, viologen derivatives (e.g., ethylviologen), nitroxide derivatives), an organic radical (e.g., piperidine derivatives (e.g., 4-isothiocyanato-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-oxo-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-(2-iodoacetamido)-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-amino-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine 1-oxyl, 2,2,6,6-tetramethylpiperidine 1-oxyl, 4-acetamido-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-amino-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-(2-chloroacetamido)-2,2,6,6-tetramethylpiperidine 1-oxyl, 2,2,6,6-tetramethyl-4-(2-propynyloxy)piperidine 1-oxyl, 2,2,6,6-tetramethylpiperidine 1-oxyl, 4-carboxy-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-glycidyloxy-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-cyano-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-oxo-2,2,6,6-tetramethylpiperidine 1-oxyl, bis(2,2,6,6-tetramethyl-4-piperidyl-1-oxyl) sebacate, 4-methoxy-2,2,6,6-tetramethylpiperidine 1-oxyl), pyrrolidine derivatives (e.g., 3-carboxy-2,2,5,5-tetramethylpyrrolidine 1-oxyl, 16-DOXYL-stearic acid), imidazoline derivatives (e.g., 2-phenyl-4,4,5,5-tetramethylimidazoline-3-oxide-1-oxyl, 2-(4-nitrophenyl)-4,4,5,5-tetramethylimidazoline-3-oxide-1-oxyl), 1,1-diphenyl-2-picrylhydrazyl, galvinoxyl) or any combination thereof. In some embodiments, the anode active material comprises a silicon atom. In some embodiments, the anode comprises a non-metal oxide as an anode active material. In some embodiments, the anode comprises a metal oxide. In some embodiments, the metal oxide comprises one or more of titanium, niobium, and vanadium. In some embodiments, the anode comprises, by way of non-limiting example, a metal oxide such as Li4Ti5O12, TiO2, TiNb2O7, Nb2O5, Li3VO4, H2Ti6O13, LiMnBO3, LiV0.5Ti0.5S2, Li3V2O5, Li3+xV2O5, Li3MoO4, Li5W2O7, or any combination thereof.
- In some embodiments, a battery according to the present disclosure does not comprise an anode.
- Anode Current Collector
- In some embodiments, a battery according to the present disclosure comprises an anode current collector in contact with an anode. In some embodiments the anode current collector is in contact with the anode, such that the anode is between the anode current collector and the electrolyte. In some embodiments, the anode current collector comprises a metal or metal alloy. In some embodiments the anode current collector comprises, by way of non-limiting example, copper, a form of copper, a copper alloy, nickel, a form of nickel, a nickel alloy, duplex steel, stainless steel, silver, a form of silver, a silver alloy, or any combination thereof.
- In some embodiments, a battery according to the present disclosure comprises an anode current collector but does not comprise an anode. In such embodiments, the anode current collector is disposed on the electrolyte such that the electrolyte is between the cathode and the anode current collector. In some embodiments, the anode current collector is the exterior housing (or casing) of the battery.
- Separator
- In some embodiments, a battery according to the present disclosure comprises a separator. In some embodiments, the separator is between the cathode and the anode. In some embodiments, the separator is in contact with the electrolyte. In some embodiments, the separator is between the anode current collector and the cathode (e.g., when the battery does not comprise an anode). In some embodiments, the separator comprises a polymer film (e.g., polyethylene, polypropylene, poly(tetrafluoroethylene), poly (vinyl chloride), etc.) nonwoven fibers (e.g., nylon, polyesters, glass, etc.), a glass, a ceramic, or any combination thereof. In some embodiments, the separator comprises glass fiber. In some embodiments, the separator comprises a surfactant coating or treatment therein or thereon to enhance wettability of a liquid-based electrolyte.
- Plasticizer/Carboxylic Acid
- In some embodiments, a battery according to the present disclosure comprises one or both of a plasticizer and a carboxylic acid in the electrolyte and/or the electrode (anode, cathode) materials. In some embodiments, the plasticizer comprises, by way of non-limiting example, succinonitrile, glutaronitrile, adiponitrile, ethylene carbonate, propylene carbonate, dimethylformamide, dimethyl sulfoxide, γ-butyrolactone, sulfolane, 3-methyl-2-oxazolidinone, butylene carbonate, phthalate derivatives, trimellitates, adipates, sebacates, maleates, or any combination thereof. In some embodiments, the plasticizer comprises succinonitrile (SN). In some embodiemtns, the carboxylic acid may be present to facilitate ion transport in and out of cathode active material. When present, the carboxylic acid can be a monocarboxylic acid or a polycarboxylic acid. When the carboxylic acid is a polycarboxylic acid, it may be oxalic acid.
- Polymer Additives
- In some embodiments, a battery according to the present disclosure comprises a polymeric compound in the electrolyte and/or the electrode (anode, cathode) materials. In some embodiments, the one or more polymer additives comprise(s), by way of non-limiting example, polycaprolactone, poly(acrylic acid), poly(methyl methacrylate), polytetrafluoroethylene, poly(vinylidene fluoride), polyacrylonitrile, poly(ethylene terephthalate), polyvinylpyrrolidone, poly(4-vinylpyridine), polyvinyl chloride, polyvinyl alcohol, polyvinyl acetate, polyethylene, polypropylene, polylactic acid, polyvinyl butyral, polystyrene, polyurethane, polycarbonate, or any combination thereof. In some embodiments, the polymeric compound comprises poly (ethylene oxide) (“PEO”).
- Greenhouse Gas Atmosphere
- In some embodiments, a battery includes greenhouse gas within the battery. In some embodiments, the battery is fabricated under a greenhouse gas atmosphere, or the greenhouse gas is introduced into the battery before use. In some embodiments, the electrolyte and/or electrode (anode, cathode) materials are in contact with the greenhouse gas. In some embodiments, the greenhouse gas comprises, by way of non-limiting example, carbon dioxide (CO2), carbon monoxide (CO), ozone (O3), methane (CH4), tetrafluoromethane (CF4), hexafluoroethane (C2F6), sulfur hexafluoride (SF6), carbon tetrachloride (CCl4), nitrous oxide (N2O), sulfur dioxide (SO2), carbon disulfide (CS2), and carbonyl sulfide (COS), one or more perfluorocarbons, one or more chlorofluorocarbons, one or more hydrofluorocarbons, or any combination thereof.
- In some embodiments, the greenhouse gas is not intended to be used as an active material. In some embodiments, the greenhouse gas is consumed or dissolved at a rate of less than 1 mg per 1 mAh, less than 0.9 mg per 1 mAh, less than 0.8 mg per 1 mAh, less than 0.7 mg per 1 mAh, less than 0.6 mg per 1 mAh, less than 0.5 mg per 1 mAh, less than 0.4 mg per 1 mAh, less than 0.3 mg per 1 mAh, less than 0.2 mg per 1 mAh, less than 0.1 mg per 1 mAh, less than 0.09 mg per 1 mAh, less than 0.08 mg per 1 mAh, less than 0.07 mg per 1 mAh, less than 0.06 mg per 1 mAh, less than 0.05 mg per 1 mAh, less than 0.04 mg per 1 mAh, less than 0.03 mg per 1 mAh, less than 0.02 mg per 1 mAh, less than 0.01 mg per 1 mAh, less than 9 μg per 1 mAh, less than 8 μg per 1 mAh, less than 7 μg per 1 mAh, less than 6 μg per 1 mAh, less than 5 μg per 1 mAh, less than 4 μg per 1 mAh, less than 3 μg per 1 mAh, less than 2 μg per 1 mAh, less than 1 μg per 1 mAh, on average during the full lifecycle of the battery. As used herein, the term “full lifecycle of the battery” is intended to mean that the life of the battery is considered to have exceeded its normal useful life, which is assumed here to be the point at which the battery shows 80% of its original capacity for the first time. In some embodiments, the greenhouse gas is consumed or dissolved at a rate of less than 0.01 mg per 1 mAh, on average during the full lifecycle of the battery.
- In some embodiments, the battery is fabricated in an atmosphere comprising, consisting essentially of, or consisting of a greenhouse gas. In some embodiments, the battery is constructed in an atmosphere that does not comprise a greenhouse gas, and the atmosphere that does not comprise a greenhouse gas is purged from the internal atmosphere of the battery and is replaced by a greenhouse gas, after the battery is fabricated.
- In some embodiments, a greenhouse gas is dissolved in an electrolyte (e.g., liquid electrolyte) using an apparatus comprising a pressure gauge, a gas inlet, a gas outlet, and a chemically resistant frit or foam submerged in the liquid electrolyte. The liquid electrolyte is kept under a greenhouse gas at a pressure above a standard atmospheric pressure for at least 10 seconds, at least 20 seconds, at least 30 seconds, at least 40 seconds, at least 50 seconds, at least 60 seconds, at least 70 seconds, at least 80 seconds, at least 90 seconds, at least 100 seconds, or longer, or any range or value therein.
- In some embodiments, the liquid electrolyte is kept under a greenhouse gas at a pressure of at least 1 bar, at least 2 bar, at least 3 bar, at least 4 bar, at least 5 bar, at least 6 bar, at least 7 bar, at least 8 bar, at least 9 bar, at least 10 bar, at least 15 bar, at least 20 bar, at least 25 bar, at least 30 bar, at least 35 bar, at least 40 bar, at least 45 bar, at least 50 bar, at least 55 bar, at least 60 bar, at least 65 bar, at least 70 bar, at least 75 bar, at least 80 bar, at least 85 bar, at least 90 bar, at least 95 bar, at least 100 bar, or any range or value therein. In some embodiments, the greenhouse gas may be at a pressure at which it is liquefied.
- In some embodiments, the greenhouse gas atmosphere is a “greenhouse gas-rich atmosphere.” In some embodiments, the greenhouse gas-rich atmosphere comprises one or more greenhouse gases at a total concentration of at least 10 vol. %, at least 15 vol. %, at least 20 vol. %, at least 25 vol. %, at least 30 vol. %, at least 35 vol. %, at least 40 vol. %, at least 45 vol. %, at least 50 vol. %, at least 55 vol. %, at least 60 vol. %, at least 65 vol. %, at least 70 vol. %, at least 75 vol. %, at least 80 vol. %, at least 85 vol. %, at least 90 vol. %, at least 91 vol. %, at least 92 vol. %, at least 93 vol. %, at least 94 vol. %, at least 95 vol. %, at least 96 vol. %, at least 97 vol. %, at least 98 vol. %, at least 99 vol. %, at least 99.5 vol. %, at least 99.6 vol. %, at least 99.7 vol. %, at least 99.8 vol. %, at least 99.9 vol. %, or any range or value therein.
- Inert Gas Atmosphere
- In some embodiments, a battery includes an inert gas within the battery. In some embodiments, the battery is fabricated under an inert gas atmosphere, or the inert gas is introduced into the battery before use. In some embodiments, the electrolyte and/or electrode (anode, cathode) materials are in contact with the inert gas. In some embodiments, the inert gas comprises, by way of non-limiting example, nitrogen, argon, helium, neon, argon, krypton, xenon, radon, or any combination thereof
- In some embodiments, the battery is fabricated in an atmosphere comprising, consisting essentially of, or consisting of an inert gas. In some embodiments, the battery is constructed in an atmosphere that does not comprise an inert gas, and the atmosphere that does not comprise an inert gas is purged from the internal atmosphere of the battery and is replaced by an inert gas, after the battery is fabricated.
- In some embodiments, an inert is dissolved in an electrolyte (e.g., liquid electrolyte) using an apparatus comprising a pressure gauge, a gas inlet, a gas outlet, and a chemically resistant frit or foam submerged in the liquid electrolyte. The liquid electrolyte is kept under an inert gas at a pressure above a standard atmospheric pressure for at least 10 seconds, at least 20 seconds, at least 30 seconds, at least 40 seconds, at least 50 seconds, at least 60 seconds, at least 70 seconds, at least 80 seconds, at least 90 seconds, at least 100 seconds, or longer, or any range or value therein.
- In some embodiments, the inert gas atmosphere is an “inert gas-rich atmosphere.” In some embodiments, the inert gas-rich atmosphere comprises one or more inert gases at a total concentration of at least 10 vol. %, at least 15 vol. %, at least 20 vol. %, at least 25 vol. %, at least 30 vol. %, at least 35 vol. %, at least 40 vol. %, at least 45 vol. %, at least 50 vol. %, at least 55 vol. %, at least 60 vol. %, at least 65 vol. %, at least 70 vol. %, at least 75 vol. %, at least 80 vol. %, at least 85 vol. %, at least 90 vol. %, at least 91 vol. %, at least 92 vol. %, at least 93 vol. %, at least 94 vol. %, at least 95 vol. %, at least 96 vol. %, at least 97 vol. %, at least 98 vol. %, at least 99 vol. %, at least 99.5 vol. %, at least 99.9 vol. %, or any range or value therein.
- Persons of ordinary skill in the art will recognize that batteries prepared according to the present disclosure, and related fabrication methods, may include any combination of the above components. To demonstrate some of the possible combinations of components for the present technology, below are provided several non-limiting examples of batteries intended to fall within the scope of this disclosure.
- In an embodiment, a battery according to the present disclosure comprises an electrolyte comprising an aliphatic nitrile compound, a cathode that comprises a halogenated compound as a cathode active material, and an anode that comprises a metal oxide as an anode active material. The battery may optionally comprise one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- In an embodiment, a battery according to the present disclosure comprises an electrolyte comprising at least three carbonate compounds, a cathode comprising a halogenated compound as a cathode active material, and an anode comprising a non-metal oxide as an anode active material. The battery may optionally comprise one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- In an embodiment, a battery according to the present disclosure comprises a liquid electrolyte comprising a dissolved greenhouse gas. The greenhouse gas is introduced into the liquid electrolyte by using a gas dispersion tubing and is kept above a standard atmospheric pressure. The battery may further comprise a cathode comprising a halogenated compound and/or an electroactive organic material. The battery may optionally comprise one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- In an embodiment, a battery according to the present disclosure comprises a greenhouse gas atmosphere within the battery. The greenhouse gas is not intended to be used as an active material. The greenhouse gas is the greenhouse gas is excluded from an electrochemical reaction during one or more of charging and discharging of the battery. The greenhouse gas is in contact with the electrode and the electrolyte. The electrolyte may be solid. The electrolyte may be liquefied gas. The battery may also include one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- In an embodiment, an apparatus for dissolving greenhouse gas in a liquid electrolyte includes a pressure gauge, a gas inlet, a gas outlet, and a chemically resistant frit or foam submerged in the liquid electrolyte and coupled to the gas inlet. The liquid electrolyte is kept under a greenhouse gas above a standard atmospheric pressure for more than 30 seconds.
- In an embodiment, a battery according to the present disclosure comprises a cathode current collector. The cathode current collector is in contact with the cathode comprising a halogenated compound. The current collector may be perforated, wherein the pore size may be 500 nm or above and the distance between pores be 10 μm or above.
- In an embodiment, a battery includes an electrolyte additive comprising a heterocyclic compound with a nitrogen atom in its ring and a cathode that comprises a halogenated compound as a cathode active material. The battery may also include one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials.
- In other embodiments and aspects, the battery may include an anode that comprises a material selected from the group consisting of lithium, sodium, potassium, magnesium, calcium, vanadium, aluminum, zinc, silicon, graphite, graphene, porous carbon, activated carbon, a form of silicon, a metal oxide and combinations thereof.
- In an embodiment, a method of fabricating a battery includes forming a battery stack comprising a cathode comprising a cathode active material incorporated onto an electrically conductive material, and an electrolyte positioned in and on the cathode. The method also includes introducing greenhouse gas into the battery stack. The electrolyte is in contact with the cathode and the greenhouse gas. The battery may perform at least one charge and/or discharge operation under the greenhouse gas at a current density of 0.1 mA/cm2 or below before use.
- In an embodiment, a method of fabricating a battery includes forming a battery stack in a greenhouse gas-rich atmosphere. The battery includes a cathode comprising a cathode active material incorporated onto an electrically conductive material, and an electrolyte positioned in and on the cathode. The electrolyte is in contact with the cathode and the greenhouse gas. The battery may perform at least one charge and/or discharge operation under the greenhouse gas at a current density of 0.1 mA/cm2 or below before use.
- Turning now to the accompanying drawing figures, various exemplary embodiments will be described in tum. It should be appreciated that while the descriptions of the various embodiments herein are written in terms of describing a single cell battery, similar principles may be applied to an assembly that includes greater than one cell battery (e.g., battery packs, etc.). Such multiple-battery assemblies should be understood to fall within the scope of the present disclosure.
-
FIG. 1 illustrates a schematic view of abattery 100 according to an exemplary embodiment. The battery includes an exterior housing 114 containing a gaseous material or internal atmosphere 112 (e.g., carbon dioxide, carbon monoxide, nitrous oxide, nitrogen, argon, methane, ozone, chlorofluorocarbons, hydrofluorocarbons, or combinations thereof), an anode current collector 104 (e.g., copper, a form of copper, a copper alloy, nickel, a form of nickel, a nickel alloy, duplex steel, stainless steel, silver, a form of silver, a silver alloy, or combinations thereof), an anode 110 (e.g., lithium, sodium, potassium, magnesium, calcium, vanadium, aluminum, zinc, silicon, graphite, graphene, porous carbon, activated carbon, a form of silicon, a metal oxide, or combinations thereof), an electrolyte 106 comprising a heterocyclic compound with at least one nitrogen atom in its ring (e.g., pyridine, imidazole, 1,2,3,6-tetrahydropyridine, piperidine, methylpyridine, aminopyridine, ethynylpyridine, vinylpyridine, dimethylpyridine, ethyl pyridine, lutidine, 4-tert-butylpyridine (TBP), 2,2′-bipyridine (BPY), 1-methylimidazole (MI), 1-methylbenzimidazole (MIB), 1-(trimethylsilyl) imidazole), methylimidazoline, vinylimidazole, dimethylimidazole, mercaptoimidazole, histamine, nitroimidazole, ethylpiperazine, methimazole, thiamazole, 2-mercapto-1-methylimidazole, dicyanoimidazole, or any combination thereof), a cathode 108 comprising a halogenated compound, and a cathode current collector 102 (e.g., aluminum, a form of aluminum, aluminum alloy, nickel, a form of nickel, nickel alloy, duplex steel, stainless steel, titanium, a form of titanium, titanium alloy, or any combination thereof). Theelectrolyte 106 may be larger in its width and length than thecurrent collector - According to an exemplary embodiment, the
battery 100 in the embodiment shown inFIG. 1 includes a halogenated compound as a cathode active material and a heterocyclic compound with at least one nitrogen atom in its ring as an electrolyte material. Theelectrolyte 106 is positioned in and between theanode 110 and thecathode 108. The battery may also include one or both of a plasticizer and a carboxylic acid as part of the cathode, anode, and/or electrolyte materials. In embodiments, the battery may operate without ananode 110. In the battery without ananode 110, the electrolyte is positioned in thecathode 108 and between the anodecurrent collector 104 and thecathode 108. -
FIG. 2 illustrates a schematic view of abattery 200 according to an exemplary embodiment. The battery includes an exterior housing 214 containing a gaseous material or internal atmosphere 212 (e.g., carbon dioxide, carbon monoxide, nitrous oxide, nitrogen, argon, methane, ozone, chlorofluorocarbons, hydrofluorocarbons), an anode current collector 204 (e.g., copper, a form of copper, a copper alloy, nickel, a form of nickel, a nickel alloy, duplex steel, stainless steel, silver, a form of silver, a silver alloy), a metal oxide anode 210 (e.g., Li4Ti5O12, TiO2, TiNb2O7, Nb2O5, Li3VO4, H2Ti6O13, LiMnB0 3, LiV0.5Ti0.5S2, Li3V2O5, Li3+xV2O5, Li3MoO4, Li5W2O7, or any combination thereof), an electrolyte 206 comprising an aliphatic nitrile compound (e.g., 3-methoxypropionitrile (MPN), methoxyacetonitrile (MAN), acetonitrile (AN), valeronitrile (VN), succinonitrile, glutaronitrile, adiponitrile, acrylonitrile, propionitrile, tolunitrile, methoxybenzonitrile, malononitrile, or any combination thereof), a cathode 208 comprising a halogenated compound, and a cathode current collector 202 (e.g., aluminum, a form of aluminum, aluminum alloy, nickel, a form of nickel, nickel alloy, duplex steel, stainless steel, titanium, a form of titanium, titanium alloy, or any combination thereof). Theelectrolyte 206 may be larger in its width and length than the anodecurrent collector 204 or cathodecurrent collector 202 to avoid a contact between theanode 210 and thecathode 208. The battery can be formed as in button cells, pouch cells, prismatic cells, cylindrical cells, flow cells, in alternating plates, or in jelly rolls, among others. - According to an exemplary embodiment, the
battery 200 in the embodiment shown inFIG. 2 includes a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte material, and a metal oxide as an anode active material. Theelectrolyte 206 is positioned in and between theanode 210 and thecathode 208. Thebattery 200 may also include one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte materials. -
FIG. 3 illustrates a schematic view of abattery 300 according to an exemplary embodiment. Thebattery 300 includes anexterior housing 314 containing a gaseous material or internal atmosphere 312 (e.g., carbon dioxide, carbon monoxide, nitrous oxide, nitrogen, argon, methane, ozone, chlorofluorocarbons, hydrofluorocarbons), an anode current collector 304 (e.g., copper, a form of copper, a copper alloy, nickel, a form of nickel, a nickel alloy, duplex steel, stainless steel, silver, a form of silver, a silver alloy), a non-metal oxide anode 310 (e.g., silicon, graphite, graphene, porous carbon, activated carbon, a form of silicon), anelectrolyte 306 comprising at least three carbonate compounds (e.g. ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), propylene carbonate (PC), dipropyl carbonate (DPC), fluoroethylene carbonate (FEC)), acathode 308 comprising a halogenated compound, and a cathode current collector 302 (e.g., aluminum, a form of aluminum, aluminum alloy, nickel, a form of nickel, nickel alloy, duplex steel, stainless steel, titanium, a form of titanium, titanium alloy, or any combination thereof). Theelectrolyte 306 may be larger in its width and length than the anodecurrent collector 304 or cathodecurrent collector 302 to avoid a contact between the anode and the cathode. The battery can be formed as in button cells, pouch cells, prismatic cells, cylindrical cells, flow cells, in alternating plates, or in jelly rolls, among others. - According to an exemplary embodiment, the
battery 300 in the embodiment shown inFIG. 3 includes a halogenated compound as a cathode active material, a non-metal oxide material as an anode active material, and at least three carbonate compounds as an electrolyte material. Theelectrolyte 306 is positioned in and between theanode 310 and thecathode 308. The battery may also include one or both of a plasticizer and a carboxylic acid as part of the anode, cathode, and/or electrolyte material. -
FIG. 4 illustrates a schematic view of abattery 400 according to an exemplary embodiment. The battery includes an exterior housing 414 containing a greenhouse gas 412 (e.g., carbon dioxide (CO2), carbon monoxide (CO), ozone (O3), methane (CH4), tetrafluoromethane (CF4), hexafluoroethane (C2F6), sulfur hexafluoride (SF6), carbon tetrachloride (CCl4), nitrous oxide (N2O), sulfur dioxide (SO2), carbon disulfide (CS2), and carbonyl sulfide (COS), or any combination thereof), an anode current collector 404 (e.g., copper, a form of copper, a copper alloy, nickel, a form of nickel, a nickel alloy, duplex steel, stainless steel, silver, a form of silver, a silver alloy, or any combination thereof), an anode 410 (e.g., lithium, sodium, potassium, magnesium, calcium, vanadium, aluminum, zinc, silicon, graphite, graphene, porous carbon, activated carbon, a form of silicon, a metal oxide, or any combination thereof), an electrolyte 406 (e.g., phosphates, fluorophosphates, amines, borates, fluoroborates, halides, halates, oxohalides, perovskites, antiperovskites, LISICON-types, garnets, sulfides, thio-LISICON types, oxynitrides, or any combination thereof), a cathode 408 (e.g., a form of sulfur, a sulfide, a form of oxygen, an oxide, an organic material having a conjugated cyclic structure, a halogenated compound, or any combination thereof), and a cathode current collector 402 (e.g., aluminum, a form of aluminum, aluminum alloy, nickel, a form of nickel, nickel alloy, duplex steel, stainless steel, titanium, a form of titanium, titanium alloy, or any combination thereof). Theelectrolyte 406 may be larger in its width and length than the cathodecurrent collector 402 or the anodecurrent collector 404 to avoid a contact between theanode 410 and thecathode 408. The battery can be formed as in button cells, pouch cells, prismatic cells, cylindrical cells, flow cells, in alternating plates, or in jelly rolls, among others. - According to an exemplary embodiment, the
atmosphere 412 of the battery in the embodiment shown inFIG. 4 includes a greenhouse gas wherein the carbon dioxide is not used as an active material. The greenhouse gas is the greenhouse gas is excluded from an electrochemical reaction during one or more of charging and discharging of the battery. Thegreenhouse gas 412 is in contact with thecathode 408,anode 410, and theelectrolyte 406. The greenhouse gas is on the surface, in the pores, and on the interface among thecathode 408 and theelectrolyte 406 materials. Thebattery 400 may also include a solid-state electrolyte. Thebattery 400 may also include a halogenated compound as a cathode material. The battery may also include a perforatedcurrent collector 402 with the pore size of 500 nm or above and the distance between pores of 10 μm or above. The battery may also include one or both of a plasticizer and a carboxylic acid as part of thecathode 408,anode 410, andelectrolyte 406 material. Thebattery 400 may operate without ananode 410. In the battery without ananode 410, theelectrolyte 406 is positioned in thecathode 408 and between the anodecurrent collector 404 and thecathode 408. - Methods for Fabricating a Battery
- The present disclosure also relates to methods for fabricating batteries as disclosed above.
- In some embodiments, the battery electrolyte material comprises a dissolved greenhouse gas which is introduced into the electrolyte before including the electrolyte in the battery.
- Referring now to
FIG. 5 , anapparatus 500 for dissolving greenhouse gas in aliquid electrolyte 502 comprises apressure gauge 504, agas inlet 506, agas outlet 508, and a chemically resistant frit orfoam 510 coupled to thegas inlet 506 and submerged in theliquid electrolyte 502. Theliquid electrolyte 502 is kept undergreenhouse gas 512 above a standard atmospheric pressure for more than 30 seconds. As used herein, the term “standard atmospheric pressure” is intended to mean a unit of pressure defined as 101,325 Pa, which is equivalent to 760 mm Hg, 29.9212 inches Hg, 14.696 psi, or 1.013 bar. -
FIG. 6 is a flow chart of amethod 600 of fabricating a battery according to an exemplary embodiment. Fabricating the battery starts with a step of inserting 602 all the cell components into an exterior housing in the order of an anode current collector, an anode, an electrolyte, a cathode, and a cathode current collector or vice versa. The second step is to compress 604 the cell components with a press so that the electrolyte is homogeneously in contact with the active anode and cathode materials. The amount of pressure needs to be controlled in order forthe anode and the cathode to be clearly separated. The third step is to assemble and close 606 the cell in a greenhouse gas rich atmosphere. The greenhouse gas in the battery is expected to chemically and/or electrochemically generate a protective layer on the surface of the anode active material, the cathode active material, and/or the electrolyte materials that is beneficial to lower the interfacial and/or charge transfer resistance. The protective layer may comprise one or more of carbon, sulfur, and oxygen. The protective layer may preferably comprise carbon and oxygen. The protective layer may be electrically insulating at room temperature. As used herein, the term “electrically insulating” is intended to mean that a material has an electrical conductivity of less than 10−2 S/cm, preferably less than 10−4 S/cm, and more preferably, less than 10−6 S/cm. The use of greenhouse gas can also add electroactive functional groups on the surface of the electrode materials and/or redesign the chemical structure of the electrode materials that may contribute to storing more energy per a unit mass or area of the electrode. The fourth step is to charge and/or discharge 608 the battery at least one time. The charging and/or discharging of the battery may be done at a current density of 0.1 mA/cm2 or below. The fifth step is to reopen the battery to lower pressure and to displace 610 a forming gas generated during the charge and/or discharge with the greenhouse gas, with the goal of removing the forming gas from within the battery (some other gases in addition to greenhouse gas may be present at the conclusion of this step). The sixth step is to reassemble and close 612 the cell under the greenhouse gas rich atmosphere. - In some embodiments, the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less (e.g., room temperature).
-
FIG. 7 is a flow chart of amethod 700 of fabricating a battery according to another exemplary embodiment. Fabricating the battery starts with a step of inserting 702 all the cell components into an exterior housing in the order of an anode current collector, an anode, an electrolyte, a cathode, and a cathode current collector or vice versa. The second step is to compress 704 the cell components with a press so that the electrolyte is homogeneously in contact with the active anode and cathode materials. The amount of pressure needs to be controlled in order for the anode and the cathode to be clearly separated. The third step is to assemble and close 706 the cell. Thefourth step 708 comprises purging through quick connectors on inlet and outlet feeds of the exterior housing and introducing a greenhouse gas to the cell components. The fifth step is to charge and/or discharge 710 the battery at least one time. The charging and/or discharging of the battery may be done at a current density of 0.1 mA/cm2 or below. The sixth step is to reopen the cell and displace 712 a forming gas generated during the charge and/or discharge with the greenhouse gas, with the goal of removing the forming gas from within the battery (some other gases in addition to greenhouse gas may be present at the conclusion of this step). The seventh step is to reassemble and close 714 the cell under the greenhouse gas atmosphere. - In some embodiments, the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less (e.g., room temperature).
-
FIG. 8 is a flow chart of amethod 800 of fabricating a battery according to another exemplary embodiment. Fabricating the battery starts with a step of inserting 802 all the cell components into an exterior housing in the order of an anode current collector, an anode, an electrolyte, a cathode, and a cathode current collector or vice versa. The second step is to compress 804 the cell components with a press so that the electrolyte is homogeneously in contact with the active anode and cathode materials. The amount of pressure needs to be controlled in order for the anode and the cathode to be clearly separated. The third step is to assemble and close 806 the cell in a greenhouse gas rich atmosphere. The fourth step is to charge and/or discharge 808 the battery at least one time. The charging and/or discharging of the battery may be done at a current density of 0.1 mA/cm2 or below. The fifth step is to reopen the cell and displace 810 a forming gas generated during the charge and/or discharge with an inert gas such argon or nitrogen, with the goal of removing the forming gas from within the battery (some other gases in addition to the inert gas may be present at the conclusion of this step). The sixth step is to reassemble and close 812 the cell under the inert gas atmosphere. The inert gas such as argon or nitrogen may reduce the risk of having structural disorder of the electrode and the electrolyte materials of the battery when cycling many times. - In some embodiments, the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less (e.g., room temperature).
-
FIG. 9 is a flow chart of amethod 900 of fabricating a battery according to another exemplary embodiment. Fabricating the battery starts with a step of inserting 902 all the cell components into an exterior housing in the order of an anode current collector, an anode, an electrolyte, a cathode, and a cathode current collector or vice versa. The second step is to compress 904 the cell components with a press so that the electrolyte is homogeneously in contact with the active anode and cathode materials. The amount of pressure needs to be controlled in order for the anode and the cathode to be clearly separated. The third step is to assemble and close 906 the cell. The fourth step involves purging through quick connectors on inlet and outlet feeds of the exterior housing and introducing 908 a greenhouse gas to the cell components. The fifth step is to charge and/or discharge 910 the battery at least one time. The charging and/or discharging of the battery may be done at a current density of 0.1 mA/cm 2 or below. The sixth step is to reopen the cell and displace 912 a forming gas generated during the charge and/or discharge with an inert gas such as argon or nitrogen, with the goal of removing the forming gas from within the battery (some other gases in addition to the inert gas may be present at the conclusion of this step). The seventh step is to reassemble and close 914 the cell under the inert gas atmosphere. - In some embodiments, the cathode is produced by a method comprising: casting the cathode active material from solution; and drying the cast cathode active material under vacuum at a temperature of about 30° C. or less (e.g., room temperature).
- Examples 1-4: Rate Capability Versus Conventional Battery Materials
- Batteries according to the present disclosure were assembled by the following procedure. A solution including 1
mmol -
FIG. 10 shows a plot illustrating the high-rate capability of a battery comprising a halogenated compound as a cathode active material, a metal oxide as an anode active material, an aliphatic nitrile compound as an electrolyte, a plasticizer, a carboxylic acid and carbon dioxide. The “rate capability” is defined as the current divided by the theoretical current draw under which the battery would deliver its nominal rated capacity in one hour. As used herein, the unit “C” is intended to mean a C-rate that is a measure of the rate at which a battery is being charged or discharged with 90% of its original specific capacity. As shown inFIG. 10 , batteries according to the present disclosure (Examples 1-4) showed markedly higher rate capability up to 20 mA/cm2 (˜20 C) than a similar battery prepared using a conventional electrolyte (Comparative Example 1). - Example 5: Low-Temperature Performance
- To test the low-temperature performance of batteries prepared according to the present disclosure, a battery was prepared in a manner similar to Example 2 above, comprising a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, oxalic acid as a carboxylic acid, succinonitrile as a plasticizer, a lithium metal anode, and carbon dioxide internal atmosphere. In particular, the electrolyte used in Example 5 was 1M LiTFSI-MAN with 5 wt. % of 1-methylbenzimidazole (MIB) as electrolyte additive.
-
FIG. 11 is a plot of voltage versus specific capacity illustrating the low-temperature performance of Example 5. The battery achieved nearly 40% of its capacity at room temperature when the battery operated at the temperature of −70° C., demonstrating the ability of batteries according to the present disclosure to achieve relatively high capacity at low operating temperatures. -
FIG. 12 compares the specific capacity at low temperature of Example 5 (1M LiTFSI-MAN with 5 wt. % of 1-methylbenzimidazole (MIB)) to that observed for an equivalent battery (Comparative Example 2) prepared using 1 M LiPF6 in EC-DEC as the electrolyte material, NMC111 (LiNi0.33Mn0.33Co0.33O2) as the cathode material, and Li metal as the anode material. As shown inFIG. 12 , batteries according to the present disclosure exhibit higher specific capacity at low operating temperature when compared to conventional batteries. - Examples 6-9: Specific Capacity as a Function of Electrolyte Additive Concentration
- To test the effect of different electrolyte additives on the specific capacity of batteries according to the present disclosure, lithium-ion batteries were prepared using a halogenated compound as a cathode active material, an aliphatic nitrile compound as an electrolyte, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, and further including a plasticizer, a carboxylic acid and carbon dioxide internal atmosphere. In particular, a solution including lithium iodide, oxalic acid and succinonitrile in diethyl ether was dropcast onto a 316L stainless steel mesh current collector that had coated with a conductive porous carbon via electrospraying. The current collector with the casted solution was then dried under vacuum at room temperature for 12 hours. Four different heterocyclic compounds were used as the electrolyte additive (Example 6: 4-tert-butylpyridine (TBP); Example 7: 2,2′-bipyridine (BPY); Example 8: 1-methylimidazole (MI); and Example 9: 1-methylbenzimidazole (MIB)). In each battery, the electrolyte comprised dissolved carbon dioxide. After cell assembly within an argon-filled glovebox (<0.1 ppm O2, <0.1 ppm H2O), each cell was removed from the glovebox, purged, and filled with carbon dioxide.
-
FIG. 13 is a plot showing the specific capacity of Examples 6-9, with respect to the amount of the electrolyte additive. Examples 6-9 demonstrated relatively high specific capacity over 160 mAh/g, with the use of 0.2 M or above of their respective heterocyclic compounds in the electrolyte solution. With the exception of Example 7 (BPY), each cell showed a maximum specific capacity at an electrolyte additive concentration of approximately 0.3 M. - Operating Voltage as a Function of Electrolyte Additive
- To test the average operating voltage of batteries according to the present disclosure using a variety of electrolyte additives, batteries were prepared in the same manner as described above for Examples 1-9, using four different heterocyclic compounds as electrolyte additives. In particular, a solution including lithium iodide and succinonitrile in diethyl ether was dropcast onto a 316L stainless steel mesh current collector that had been coated with a conductive porous carbon via electrospraying. The current collector with the casted solution was then dried under vacuum at room temperature for 12 hours. Four different heterocyclic compounds were used as the electrolyte additive: 4-tert-butylpyridine (TBP) (Example 6); 2,2′-bipyridine (BPY) (Example 7); 1-methylimidazole (MI) (Example 8); and 1-methylbenzimidazole (MIB) (Example 9). Comparative Example 3 is a battery prepared in the same manner as above, having succinonitrile (SN) as an electrolyte additive. Comparative Example 4 includes polyethylene oxide (PEO) as an electrolyte additive. Comparative Example 5 has no electrolyte additive. In each battery, the electrolyte comprised dissolved carbon dioxide. After cell assembly within an argon-filled glovebox (<0.1 ppm O2, <0.1 ppm H2O), each cell was removed from the glovebox, purged, and filled with carbon dioxide.
-
FIG. 14 plots operating discharge voltage for batteries with different electrolyte additives. The data show an increase in the average operating voltage for TBP, BPY, MI, MIB as the electrolyte additive, while SN and PEO afforded very little increase in operating voltage over batteries having no electrolyte additive at all. The data shows batteries according the present disclosure achieve high average operating discharge voltage of 3.1V or above with the use of the heterocyclic compound in the electrolyte solution. - Electrochemical Utilization
- To test the effect of the greenhouse gas atmosphere on the electrochemical utilization of active electrode materials in batteries according to the present disclosure, oxidation and reduction peak currents were measured under argon and carbon dioxide atmosphere. Batteries were prepared in the same manner as described above for Examples 1-9. A solution including lithium iodide and succinonitrile in diethyl ether was dropcast onto a 316L stainless steel mesh current collector that had been coated with a conductive porous carbon via electrospraying. The current collector with the casted solution was then dried under vacuum at room temperature for 12 hours. MIB was used as the electrolyte additive. After cell assembly within an argon-filled glovebox (<0.1 ppm O2, <0.1 ppm H2O), one cell was removed from the glovebox, purged, and filled with carbon dioxide (Example 11), while the argon atmosphere was left intact for the other cell (Example 12).
-
FIG. 15 shows the electrochemical utilization by plotting oxidation and reduction currents at different sweep rates for Example 11 (CO2) and Example 12 (Ar). Example 11 (CO2) exhibited higher oxidation and reduction peak currents at all sweep rates, when compared to a battery operated under argon (Example 12). The result shows that the presence of carbon dioxide improves the utilization of the active electrode materials. - Effect of Dissolved Greenhouse Gas Concentration on Specific Capacity
- To demonstrate the effect of dissolved greenhouse gas concentration on the specific capacity of batteries according to the present disclosure, batteries were prepared using electrolytes that had been prepared under different carbon dioxide gas overpressures, with higher overpressures corresponding to higher concentrations of dissolved carbon dioxide gas in the electrolyte. Batteries were prepared in the same manner as described above for Examples 1-12, with MIB as the electrolyte additive. However, for each battery, the electrolyte material was exposed to a different carbon dioxide overpressure to dissolve different concentrations of carbon dioxide in the electrolyte (
FIG. 5 ). The electrolyte solution was kept under the carbon dioxide atmosphere for 1 hour for each pressure. Cell assembly was carried out in an argon-filled glovebox (<0.1 ppm O2, <0.1 ppm H2O). -
FIG. 16 shows an increase in the specific capacity of batteries according to the present disclosure, as a function of the carbon dioxide pressure used to dissolve carbon dioxide in the electrolyte. For relatively low CO2 pressures, specific capacity shows a sharp increase with small pressure increases, indicating an increase concentration of dissolved CO2 enhances the specific capacity of the battery. The battery exhibited its highest specific capacity of over 150 mAh/g with the carbon dioxide pressure of 10 bar or greater for the liquid electrolyte storage. Increased carbon dioxide pressure beyond 10 bar provided minimal, if any, increase in specific capacity. - Effect of Internal Greenhouse Gas Pressure on Specific Capacity
- To demonstrate the effect of internal greenhouse gas pressure on the specific capacity of batteries according to the present disclosure, batteries were prepared in the same manner as described above for Examples 1-12, with MIB as the electrolyte additive. However, for each battery, the internal carbon dioxide pressure inside the cell was varied when the cell was removed from the glovebox, purged, and filled with carbon dioxide gas.
-
FIG. 17 shows the increase in the specific capacity of a battery with respect to the carbon dioxide pressure in the cell atmosphere. The battery demonstrated its highest specific capacity of over 160 mAh/g at the carbon dioxide pressure of 1 bar or greater in the cell atmosphere. - Effect of Internal Greenhouse Gas Pressure on Self-Discharge Rate
- To demonstrate the effect of internal greenhouse gas pressure on the self-discharge rate of batteries according to the present disclosure, batteries were prepared in the same manner as described above for Examples 1-12, with MIB as the electrolyte additive. However, for each battery, the internal carbon dioxide pressure inside the cell was varied when the cell was removed from the glovebox, purged, and filled with carbon dioxide gas.
-
FIG. 18 shows the decrease in self-discharge rate of batteries according to the present disclosure with respect to the carbon dioxide pressure in the cell atmosphere. The battery demonstrated its lowest self-discharge rate of approximately 5 mV/h at an internal carbon dioxide pressure of 1 bar or greater. - Effect of Plasticizer on the Specific Capacity, Coulombic Efficiency, and Self-Discharge Rate
- To demonstrate the effect of plasticizer concentration on the specific capacity, coulombic efficiency, and self-discharge rate of batteries according to the present disclosure, batteries were prepared in the same manner as described above for Examples 1-12, but with varied concentrations of succinonitrile (SN) as the plasticizer material in the cathode active material.
-
FIG. 19 plots the increase in the specific capacity and the coulombic efficiency of a battery with respect to the plasticizer concentration. As used herein, the term “coulombic efficiency” is intended to mean the ratio of the total charge extracted from the battery to the total charge put into the battery over a full cycle. The battery exhibited its highest specific capacities of 160 mAh/g or greater and coulombic efficiencies near or exceeding 98% when the plasticizer was present at a concentration of 2%. At higher plasticizer concentrations, the coulombic efficiency remained steady, while the specific capacity decreased markedly when the plasticizer concentration exceeded about 3%. -
FIG. 20 plots the self-discharge rate as a function of plasticizer concentration. The battery demonstrated its lowest self-discharge rates of approximately 5 mV/h when the plasticizer concentration exceeded about 3 wt. % of the cathode composition. - Battery Life
- To test the battery life of batteries according to the present disclosure, batteries were prepared in the same manner as disclosed above for Examples 1-12, with the addition of PEO to the electrolyte. In particular, a solution including lithium iodide and succinonitrile in diethyl ether was dropcast onto a 316L stainless steel mesh current collector that had coated with a conductive porous carbon via electrospraying. The current collector with the casted solution was then dried under vacuum at room temperature for 12 hours. However, in this experiment, 0.9M LiPF6 EC-DEC-DMC-EMC (1:1:1:3 in a volume ratio) quaternary carbonate electrolyte solution was used to test the cycle life of the battery at 0° C. operating temperature. MI was selected for the heterocyclic electrolyte additive, oxalic acid as a carboxylic acid, and succinonitrile for the plasticizer. Poly(ethylene oxide) (PEO) was added to the electrolyte at a concentration of 1 wt. %. The electrolyte comprised dissolved carbon dioxide. The cell assembly was done in an argon-filled glovebox (<0.1 ppm O2, <0.1 ppm H2O), and the cell was purged and introduced with carbon dioxide outside of the glovebox.
-
FIG. 21 is a plot showing the superior cycle life at an operating temperature of 0° C., for a battery comprising a halogenated compound as a cathode active material, an electrolyte comprising three carbonate compounds, a heterocyclic compound with a nitrogen atom in its ring as an electrolyte additive, a polymeric additive, succinonitrile as a plasticizer, oxalic acid as a carboxylic acid and a carbon dioxide atmosphere. The battery demonstrated its superior cycle number of 2,000 relative to a battery lacking PEO or a plasticizer. - The present disclosure has described the use of various features and methods for producing batteries. It should be understood that any combination of such features and methods are within the scope of the present disclosure. For example, an embodiment that describes the use of a halogenated compound for the cathode active material may be modified to be produced under a greenhouse gas-rich atmosphere, and such modification is intended to be within the scope of the present disclosure. Other permutations and combinations that utilize one or more of the features/methods described herein are also possible, and such permutations and combinations are also considered part of the present disclosure without enumerating them specifically.
- Notwithstanding the embodiments described above and shown in the accompanying drawing figures, various modifications and inclusions to those embodiments are contemplated and considered within the scope of the present disclosure.
- As utilized herein with respect to numerical ranges, the terms “approximately,” “about,” “substantially,” and similar terms generally mean +/−10% of the disclosed values, unless specified otherwise. As utilized herein with respect to structural features (e.g., to describe shape, size, orientation, direction, relative position, etc.), the terms “approximately,” “about,” “substantially,” and similar terms are meant to cover minor variations in structure that may result from, for example, the manufacturing or assembly process and are intended to have a broad meaning in harmony with the common and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alterations of the subject matter described and claimed are considered to be within the scope of the disclosure as recited in the appended claims.
- It should be noted that the term “exemplary” and variations thereof, as used herein to describe various embodiments, are intended to indicate that such embodiments are possible examples, representations, or illustrations of possible embodiments (and such terms are not intended to connote that such embodiments are necessarily extraordinary or superlative examples).
- The term “coupled” and variations thereof, as used herein, means the joining of two members directly or indirectly to one another. Such joining may be stationary (e.g., permanent or fixed) or moveable (e.g., removable or releasable). Such joining may be achieved with the two members coupled directly to each other, with the two members coupled to each other using a separate intervening member and any additional intermediate members coupled with one another, or with the two members coupled to each other using an intervening member that is integrally formed as a single unitary body with one of the two members. If “coupled” or variations thereof are modified by an additional term (e.g., directly coupled), the generic definition of “coupled” provided above is modified by the plain language meaning of the additional term (e.g., “directly coupled” means the joining of two members without any separate intervening member), resulting in a narrower definition than the generic definition of “coupled” provided above. Such coupling may be mechanical, electrical, or fluidic.
- References herein to the positions of elements (e.g., “top,” “bottom,” “above,” “below”) are merely used to describe the orientation of various elements in the FIGURES. It should be noted that the orientation of various elements may differ according to other exemplary embodiments, and that such variations are intended to be encompassed by the present disclosure.
- Although the figures and description may illustrate a specific order of method steps, the order of such steps may differ from what is depicted and described, unless specified differently above. Also, two or more steps may be performed concurrently or with partial concurrence, unless specified differently above.
- It is important to note that any element disclosed in one embodiment may be incorporated or utilized with any other embodiment disclosed herein. Although only one example of an element from one embodiment that can be incorporated or utilized in another embodiment has been described above, it should be appreciated that other elements of the various embodiments may be incorporated or utilized with any of the other embodiments disclosed herein.
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